10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2013

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 001-32108

  Hornbeck Offshore Services, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	72-1375844
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

103 NORTHPARK BOULEVARD, SUITE 300

COVINGTON, LA 70433

(Address of Principal Executive Offices) (Zip Code)

(985) 727-2000

(Registrant’s Telephone Number, Including Area Code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.YesxNoo

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). YesxNoo

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filerx	Non-accelerated filer o
Accelerated filero	Smaller reporting companyo

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YesoNox

The total number of shares of common stock, par value $.01 per share, outstanding as of October 31, 2013 was 36,052,317.

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2013

TABLE OF CONTENTS

PART 1—FINANCIAL INFORMATION	1
Item 1—Financial Statements	1
Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations	12
Item 3—Quantitative and Qualitative Disclosures About Market Risk	29
Item 4—Controls and Procedures	29
PART II—OTHER INFORMATION	30
Item 1—Legal Proceedings	30
Item 1A—Risk Factors	30
Item 2—Unregistered Sales of Equity Securities and Use of Proceeds	30
Item 3—Defaults Upon Senior Securities	30
Item 4—Mine Safety Disclosures	30
Item 5—Other Information	30
Item 6—Exhibits	33
SIGNATURE	37

i

PART 1—FINANCIAL INFORMATION

Item 1—Financial Statements

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In thousands, except per share data)

	September 30, 2013			December 31, 2012
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	797,784		$	576,678
Accounts receivable, net of allowance for doubtful accounts of $3,149 and $3,028, respectively	88,132			103,265
Deferred tax assets, net	51,602			28,720
Other current assets	16,390			21,560
Current assets from discontinued operations	90			1,286
Total current assets	953,998			731,509
Property, plant and equipment, net	2,000,890			1,643,623
Deferred charges, net	76,797			69,492
Other assets	12,605			13,277
Long-term assets from discontinued operations	818			173,830
Total assets	$	3,045,108		$	2,631,731
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	53,997		$	48,286
Accrued interest	15,171			14,790
Accrued payroll and benefits	14,846			12,441
Deferred revenue	24,636			16,854
Current portion of long-term debt, net of original issue discount of $1,139 and $11,093, respectively	248,861			238,907
Other accrued liabilities	17,104			8,030
Current liabilities from discontinued operations	172			4,197
Total current liabilities	374,787			343,505
Long-term debt, net of original issue discount of $63,177 and $74,470, respectively	1,061,823			850,530
Deferred tax liabilities, net	334,070			270,478
Other liabilities	4,527			1,373
Total liabilities	1,775,207			1,465,886
Stockholders’ equity:
Preferred stock: $0.01 par value; 5,000 shares authorized; no shares issued and outstanding	—			—
Common stock: $0.01 par value; 100,000 shares authorized; 36,048 and 35,479 shares issued and outstanding, respectively	360			355
Additional paid-in-capital	720,874			705,658
Retained earnings	549,243			460,090
Accumulated other comprehensive loss	(576		)	(258		)
Total stockholders’ equity	1,269,901			1,165,845
Total liabilities and stockholders’ equity	$	3,045,108		$	2,631,731

The accompanying notes are an integral part of these consolidated statements.

1

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

	Three Months Ended    September 30,						Nine Months Ended   September 30,
	2013			2012			2013			2012
	(Unaudited)						(Unaudited)
Revenues	$	132,915		$	115,087		$	403,252		$	344,678
Costs and expenses:
Operating expenses	59,180			59,922			174,175			168,250
Depreciation	13,854			13,000			40,498			39,005
Amortization	8,582			5,289			22,265			15,287
General and administrative expenses	14,114			12,191			40,433			33,750
	95,730			90,402			277,371			256,292
Gain (loss) on sale of assets	3			(357		)	1,572			(360		)
Operating income	37,188			24,328			127,453			88,026
Other income (expense):
Loss on early extinguishment of debt	—			—			(25,776		)	(6,048		)
Interest income	681			524			1,926			1,538
Interest expense	(11,708		)	(14,697		)	(38,672		)	(42,971		)
Other income (expense), net	(137		)	(8		)	(153		)	323
	(11,164		)	(14,181		)	(62,675		)	(47,158		)
Income before income taxes	26,024			10,147			64,778			40,868
Income tax expense	8,228			3,970			22,787			15,596
Income from continuing operations	17,796			6,177			41,991			25,272
Income from discontinued operations, net of tax	41,368			1,224			47,162			450
Net income	$	59,164		$	7,401		$	89,153		$	25,722
Earnings per share:
Basic earnings per common share from continuing operations	$	0.49		$	0.18		$	1.17		$	0.72
Basic earnings per common share from discontinued operations	1.15			0.03			1.32			0.01
Basic earnings per common share	$	1.64		$	0.21		$	2.49		$	0.73
Diluted earnings per common share from continuing operations	$	0.49		$	0.17		$	1.15		$	0.70
Diluted earnings per common share from discontinued operations	1.12			0.03			1.29			0.01
Diluted earnings per common share	$	1.61		$	0.20		$	2.44		$	0.71
Weighted average basic shares outstanding	36,038			35,384			35,841			35,276
Weighted average diluted shares outstanding	36,663			36,130			36,511			36,063

The accompanying notes are an integral part of these consolidated statements.

2

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(In thousands)

	Three Months Ended    September 30,					Nine Months Ended   September 30,
	2013		2012			2013			2012
	(Unaudited)					(Unaudited)
Net income	$	59,164	$	7,401		$	89,153		$	25,722
Other comprehensive income, net of tax:
Foreign currency translation income (loss)	5		(59		)	(318		)	(156		)
Total comprehensive income	$	59,169	$	7,342		$	88,835		$	25,566

The accompanying notes are an integral part of these consolidated statements.

3

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Nine Months Ended   September 30,
	2013			2012
	(Unaudited)
CASH FLOWS FROM OPERATING ACTIVITIES:
Income from continuing operations	$	41,991		$	25,272
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Depreciation	40,498			39,005
Amortization	22,265			15,287
Stock-based compensation expense	9,603			8,102
Loss on early extinguishment of debt	25,776			6,048
Provision for bad debts	121			1,657
Deferred tax expense	15,285			15,236
Amortization of deferred financing costs	14,134			11,962
(Gain) loss on sale of assets	(1,572		)	360
Changes in operating assets and liabilities:
Accounts receivable	15,433			(10,765		)
Other receivables and current assets	7,465			(318		)
Deferred drydocking charges	(25,444		)	(27,705		)
Accounts payable	(11,114		)	8,853
Accrued liabilities and other liabilities	13,113			(1,391		)
Accrued interest	382			7,151
Net cash provided by operating activities	167,936			98,754
CASH FLOWS FROM INVESTING ACTIVITIES:
Costs incurred for OSV newbuild program #5	(344,909		)	(149,625		)
Net proceeds from sale of assets	16,118			3,002
Vessel capital expenditures	(46,372		)	(13,054		)
Non-vessel capital expenditures	(3,459		)	(2,601		)
Net cash used in investing activities	(378,622		)	(162,278		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax benefit from share-based payments	5,127			—
Repayment of senior notes	(250,000		)	(300,000		)
Proceeds from the issuance of senior notes	450,000			375,000
Premium on the retirement of debt	(17,658		)	(3,692		)
Payments for public offering of common stock	—			(180		)
Purchase of hedge on convertible senior notes	—			(73,032		)
Sale of common stock warrants	—			48,237
Proceeds from the issuance of convertible senior notes	—			300,000
Deferred financing costs	(7,771		)	(16,451		)
Net cash proceeds from other shares issued	7,840			2,579
Net cash provided by financing activities	187,538			332,461
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash provided by operating activities	15,996			9,682
Net cash provided by (used in) investing activities	228,576			(1,698		)
Net cash provided by discontinued operations	244,572			7,984
Effects of exchange rate changes on cash	(318		)	(156		)
Net increase in cash and cash equivalents	221,106			276,765
Cash and cash equivalents at beginning of period	576,678			356,849
Cash and cash equivalents at end of period	$	797,784		$	633,614
SUPPLEMENTAL DISCLOSURES OF CASH FLOW ACTIVITIES:
Cash paid for interest	$	40,216		$	28,755
Cash paid for income taxes	$	3,319		$	964

The accompanying notes are an integral part of these consolidated statements.

4

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. Basis of Presentation

The accompanying unaudited consolidated financial statements do not include certain information and footnote disclosures required by United States generally accepted accounting principles, or GAAP. The interim financial statements and notes are presented as permitted by instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments necessary for a fair presentation of the interim financial statements have been included and consist only of normal recurring items. The unaudited quarterly financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Annual Report on Form 10-K of Hornbeck Offshore Services, Inc. (together with its subsidiaries, the “Company”) for the year ended December 31, 2012. The results of operations for the nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. Certain reclassifications have been made to prior period results to conform to current year presentation. The most significant of these reclassifications are associated with the Company's discontinued operations. As discussed further in Note 6, the Company sold substantially all of its Downstream assets in August 2013.

The consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements.

2. Earnings Per Share

Basic earnings per common share was calculated by dividing income from continuing operations and income from discontinued operations by the weighted average number of common shares outstanding during the period. Diluted earnings per common share was calculated by dividing income from continuing operations and income from discontinued operations by the weighted average number of common shares outstanding during the year plus the effect of dilutive stock options and restricted stock unit awards. Weighted average number of common shares outstanding was calculated by using the sum of the shares determined on a daily basis divided by the number of days in the period. The table below reconciles the Company’s earnings per share (in thousands, except for per share data): 

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income from continuing operations (1)	$	17,796	$	6,177	$	41,991	$	25,272
Income from discontinued operations, net of tax (2)	41,368		1,224		47,162		450
Net income	$	59,164	$	7,401	$	89,153	$	25,722
Weighted average number of shares of common stock outstanding	36,038		35,384		35,841		35,276
Add: Net effect of dilutive stock options and unvested restricted stock (3)(4)(5)	625		746		670		787
Weighted average number of dilutive shares of common stock outstanding	36,663		36,130		36,511		36,063
Earnings per common share:
Basic earnings per common share from continuing operations	$	0.49	$	0.18	$	1.17	$	0.72
Basic earnings per common share from discontinued operations	1.15		0.03		1.32		0.01
Basic earnings per common share	$	1.64	$	0.21	$	2.49	$	0.73
Diluted earnings per common share from continuing operations	$	0.49	$	0.17	$	1.15	$	0.70
Diluted earnings per common share from discontinued operations	1.12		0.03		1.29		0.01
Diluted earnings per common share	$	1.61	$	0.20	$	2.44	$	0.71

(1) Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

(2) On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

5

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(3) For the three and nine months ended September 30, 2013 and 2012, the Company had no anti-dilutive stock options. Stock options are anti-dilutive when the exercise price of the options is greater than the average market price of the common stock for the period or when the results from operations are a net loss.

(4) As of September 30, 2013 and 2012 and for the periods then ended, the 2019 convertible senior notes and 2026 convertible senior notes were not dilutive, as the average price of the Company’s stock was less than the effective conversion price of such notes.

(5) Dilutive unvested restricted stock units are expected to fluctuate from quarter to quarter depending on the Company’s performance compared to a predetermined set of performance criteria. See Note 4 to these financial statements for further information regarding certain of the Company’s restricted stock grants.

3. Long-Term Debt

As of the dates indicated, the Company had the following outstanding long-term debt (in thousands):

	September 30, 2013			December 31, 2012
8.000% senior notes due 2017, net of original issue discount of $4,771	$	—		$	245,229
5.875% senior notes due 2020	375,000			375,000
5.000% senior notes due 2021	450,000			—
1.500% convertible senior notes due 2019, net of original issue discount of $63,177 and $69,699	236,823			230,301
1.625% convertible senior notes due 2026, net of original issue discount of $1,139 and $11,093 (1)	248,861			238,907
Revolving credit facility due 2016	—			—
	1,310,684			1,089,437
Less current maturities	(248,861		)	(238,907		)
	$	1,061,823		$	850,530

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

The table below summarizes the Company's cash interest payments (in thousands):

	Semi-Annual Cash Interest Payment		Payment Dates
5.875% senior notes due 2020	$	11,000	April 1 and October 1
5.000% senior notes due 2021	11,300		March 1 and September 1
1.500% convertible senior notes due 2019	2,300		March 1 and September 1
1.625% convertible senior notes due 2026 (1)	2,000		May 15 and November 15

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

On March 14, 2013, the Company commenced a cash tender offer for all of the outstanding $250.0 million aggregate principal amount of its 2017 senior notes. Senior notes totaling approximately 94% of the 2017 senior notes outstanding, were validly tendered during the designated tender period and were repurchased at 107.12% of par on March 28, 2013. The remaining 2017 senior notes were redeemed at 106.20% of par on May 13, 2013. A loss on early extinguishment of debt for the 2017 senior notes of approximately $24.3 million was recorded during the first quarter of 2013, which includes the tender offer costs, an allocable portion of the write-off of unamortized financing costs and original issue discount, and a bond redemption premium. A loss on early extinguishment of debt of approximately $1.5 million was recorded during the second quarter of 2013 for those costs allocable to the 2017 senior notes redeemed on May 13, 2013.

On March 14, 2013, the Company issued $450.0 million in aggregate principal amount of 2021 senior notes. The net proceeds to the Company from the offering were approximately $442.4 million, net of estimated transaction costs. The Company used $252.7 million of such proceeds to repurchase approximately 94% of the outstanding 2017 senior notes pursuant to its tender offer noted above. The Company used approximately $16.6 million of proceeds on May 13, 2013 to redeem the remaining 6% of the outstanding 2017 senior notes pursuant to the redemption noted above. The remaining proceeds are available for general corporate

6

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

purposes, which may include funding for the acquisition, construction or retrofit of vessels. The 2021 senior notes mature on March 1, 2021 and require semi-annual interest payments of $11.3 million due and payable each March 1 and September 1 of each year until maturity, commencing September 1, 2013. The effective interest rate on the new senior notes is 5.21%. No principal payments are due until maturity.

Pursuant to a registeredexchange offer, the 2021 senior notes issued in March 2013 that were initially sold pursuant to private placements were exchanged by the holders for 2021 senior notes with substantially the same terms, except that the issuance of the 2021 senior notes in the exchange offer was registered under the Securities Act of 1933, as amended, or the Securities Act. The original 2021 senior notes and the similar notes exchanged were issued under and are entitled to the benefits of the same 2013 indenture. Holders of the 2021 senior notes are entitled to certain registration rights as set forth in an exchange and registration rights agreement dated as of March 28, 2013.

The 2021 senior notes are senior unsecured obligations and rank equally in right of payment with other existing and future senior indebtedness and senior in right of payment to any subordinated indebtedness that may be incurred by the Company in the future. The 2021 senior notes are guaranteed by certain of the Company’s subsidiaries. The guarantees are full and unconditional, joint and several, and all of the Company’s non-guarantor subsidiaries are minor as defined in the Securities and Exchange Commission regulations. Hornbeck Offshore Services, Inc., as the parent company issuer of the 2021 senior notes, has no independent assets or operations other than its ownership interest in its subsidiaries and affiliates. There are no significant restrictions on the Company’s ability, or the ability of any guarantor, to obtain funds from its subsidiaries by such means as a dividend or loan.

The Company may, at its option, redeem all or part of the 2021 senior notes from time to time at specified redemption prices and subject to certain conditions required by the indenture governing the 2021 senior notes. The Company is permitted under the terms of the indenture to incur additional indebtedness in the future, provided that certain financial conditions set forth in the indenture are satisfied by the Company.

On September 13, 2013, the Company issued a notice of redemption for all of the outstanding $250 million aggregate principal amount of its 2026 convertible senior notes. The Company has elected to redeem the 2026 notes on November 15, 2013, or the Redemption Date, at a redemption price of 100% of the principal amount thereof and accrued and unpaid interest to, but excluding, the Redemption Date. Holders may convert the 2026 notes at any time prior to the close of business on November 12, 2013, at a conversion rate of 20.6260 shares of the Company's common stock per $1,000 principal amount of 2026 notes, which equates to a conversion price of $48.48 per share, with a related Observation Period (as defined in the Indenture governing the 2026 notes) of October 8, 2013 through November 11, 2013. For those holders that elect to convert their 2026 notes in connection with the redemption, the Company will satisfy its conversion obligations to holders by paying cash equal to the aggregate principal amount of the 2026 notes converted and delivering shares of common stock in settlement of any and all conversion obligations in excess of the principal amount (provided that the Company will pay cash in lieu of issuing fractional shares). For those holders that elect to convert their 2026 notes, the counterparties to the previously disclosed convertible note hedge transactions entered into in 2006 concurrently with the pricing of the 2026 notes will deliver common stock that will reduce or prevent equity dilution that would otherwise result from the conversion. The Company expects to meet any cash payment obligations related to the redemption or conversion with cash currently on-hand.

In addition to the convertible note hedge transactions entered into in 2006, the Company entered into separate warrant transactions, or warrants, whereby it sold to the counterparties warrants to acquire, subject to customary anti-dilution adjustments, approximately 4.5 million shares of the Company's common stock at a strike price equal to $62.59 per share of common stock. On exercise of the warrants, the Company has the option to deliver cash or shares of its common stock equal to the difference between the then-market price and strike price per share of common stock. The warrants expire in a series of tranches beginning February 13, 2014 through the 30^th trading day thereafter.

7

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The Company has an undrawn senior secured revolving credit facility, with a borrowing base of $300.0 million and an accordion feature that allows for the potential expansion of the facility up to an aggregate of $500.0 million. The facility matures in November 2016.

Under the Company’s revolving credit facility, it has the option of borrowing at a variable rate of interest equal to either (i) LIBOR, plus an applicable margin, or (ii) the greatest of the Prime Rate, the Federal Funds Effective Rate plus  ¹/₂ of 1% and the one-month LIBOR plus 1%, plus in each case an applicable margin. The applicable margin for each base rate is determined by a pricing grid, which is based on the Company’s leverage ratio, as defined in the credit agreement governing the amended revolving credit facility. Unused commitment fees are payable quarterly at the annual rate ranging from 37.5 basis points to 50.0 basis points as determined by a pricing grid.

As of September 30, 2013, there were no amounts drawn under the Company’s $300.0 million revolving credit facility and $0.9 million posted as letters of credit. As of September 30, 2013, the Company was in compliance with all financial covenants required by its revolving credit facility and the full amount of the undrawn borrowing base under the facility was available to the Company for all permissible uses of proceeds, including working capital, if necessary.

The Company estimates the fair value of its 2020 senior notes, 2021 senior notes, 2019 convertible senior notes and 2026 convertible senior notes by primarily using quoted market prices. The fair value of the Company’s revolving credit facility, when there are outstanding balances, approximates its carrying value. The face value, carrying value and fair value of the Company’s total debt was $1,375.0 million, $1,310.7 million and $1,493.2 million, respectively, as of September 30, 2013. Given the observability of the inputs to these estimates, the fair values presented for long-term debt have been assigned a Level 2, of the three-level valuation hierarchy.

Capitalized Interest

During the three and nine months ended September 30, 2013, the Company capitalized approximately $8.8 million and $22.2 million respectively, of interest costs related to the construction of vessels. During the three and nine months ended September 30, 2012, the Company capitalized approximately $2.9 million and $6.4 million respectively, of interest costs related to the construction of vessels.

4. Incentive Compensation

Stock-Based Incentive Compensation Plan

The Company’s stock-based incentive compensation plan covers a maximum of 4.2 million shares of common stock that allows the Company to grant restricted stock awards, restricted stock unit awards, or collectively restricted stock, stock options and stock appreciation rights to employees and directors.

During the nine months ended September 30, 2013, the Company granted cash-settled phantom restricted stock units, time-based restricted stock units and performance-based restricted stock units. Time-based restricted stock units were granted to executive officers and directors of the Company. Cash-settled phantom restricted stock units were granted to certain shoreside employees of the Company. Performance-based restricted stock units were granted to executive officers of the Company. The shares to be received under the performance-based restricted stock units are calculated based on the Company’s performance compared to three pre-determined criteria, as defined by the restricted stock agreements governing such awards. The actual number of shares that could be received by the award recipients can range from 0% to 100% of the Company’s awards depending on the Company’s performance. During the nine months ended September 30, 2013, the Company granted 201,745 time-based and performance-based restricted stock units and 21,490 cash-settled phantom restricted stock units.

8

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Compensation expense related to 2013 restricted stock unit grants is recognized over the three-year service period. The fair value of the Company’s performance-based restricted stock units, which is the stock price on the date of grant, is applied to the total shares that are expected to fully vest and is amortized over the vesting period, which is generally three years, based on the Company’s internal performance measured against the pre-determined criteria, as applicable. The compensation expense related to time-based restricted stock units and cash-settled phantom restricted stock units are amortized over a vesting period of up to three years, as applicable, and is determined based on the market price of the Company’s stock on the date of grant applied to the total shares that are expected to fully vest. The cash-settled phantom restricted stock units are re-measured quarterly and classified as a liability, due to the settlement of these awards in cash. In addition to the restricted stock units granted in 2013, the Company granted performance-based and time-based restricted stock units in 2010, 2011 and 2012. During the nine months ended September 30, 2013, the Company issued 569,472 shares, in the aggregate, of stock due to: 1) employees exercising previously vested stock options, 2) vestings of restricted stock units and 3) employee purchases under the Company’s Employee Stock Purchase Plan.

The stock-based compensation expense charges from previously issued equity grants and the financial impact such grants have on the Company’s operating results are reflected in the table below (in thousands, except for per share data):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income before taxes	$	3,185	$	3,729	$	9,629	$	8,164
Net income	$	2,066	$	2,278	$	6,164	$	5,045
Earnings per common share:
Basic earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14
Diluted earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14

5. Commitments and Contingencies

Vessel Construction

In November 2011, the Company announced, and has since expanded, its fifth OSV newbuild program. This program now consists of vessel construction contracts with three domestic shipyards to build four 300 class OSVs, six 310 class OSVs, ten 320 class OSVs and four 310 class MPSVs. As of October 31, 2013, the Company has placed two vessels in-service under its fifth newbuild program. The 22 remaining vessels under this 24-vessel domestic newbuild program are currently expected to be placed in service as follows: three more in 2013, 13 in 2014, four in 2015 and two in 2016. Based on current contracts and internal estimates, the aggregate total cost of this program, before construction period interest, is expected to be approximately $1,240.0 million. As of September 30, 2013, the Company had incurred construction costs of approximately $603.4 million, or 48.7%, since the inception of its fifth OSV newbuild program.

200 Class OSV Retrofit Program

In September 2012, the Company awarded a contract for the upgrading and stretching of six of the Company’s Super 200 class DP-1 OSVs, converting them into 240 class DP-2 OSVs. The project costs for these discretionary vessel modifications are expected to be approximately $50.0 million, in the aggregate ($8.3 million each), and the Company expects to incur approximately 799 vessel-days of aggregate commercial downtime for the six vessels (roughly 133 vessel-days each). Two vessels each were re-delivered to the Company in May and September 2013 and the current schedule projects re-deliveries of the last two vessels in December 2013. As of September 30, 2013, the Company had incurred construction costs of approximately $39.9 million, or 80%, since the inception of its 200 class OSV retrofit program.

9

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Contingencies

In the normal course of its business, the Company becomes involved in various claims and legal proceedings in which monetary damages are sought. It is management’s opinion that the Company’s liability, if any, under such claims or proceedings would not materially affect its financial position, results of operations, or cash flows. The Company insures against losses relating to its vessels, pollution and third party liabilities, including claims by employees under Section 33 of the Merchant Marine Act of 1920, or the Jones Act. Third party liabilities and pollution claims that relate to vessel operations are covered by the Company’s entry in a mutual protection and indemnity association, or P&I Club, as well as by marine liability policies in excess of the P&I Club’s coverage. The Company provides reserves for any individual claim deductibles for which the Company remains responsible by using an estimation process that considers Company-specific and industry data, as well as management’s experience, assumptions and consultation with outside counsel. As additional information becomes available, the Company will assess the potential liability related to its pending claims and revise its estimates. Although revisions to such estimates historically have not been material, changes in estimates of the potential liability could materially impact the Company’s results of operations, financial position or cash flows.

During 2010 and 2011, the Company mobilized 12 vessels, in the aggregate, to Brazil to operate under long-term contracts for Petrobras. These vessel charters with Petrobras include limitations regarding fuel consumption. Petrobras has asserted claims against the Company relating to excess fuel consumption. The Company’s exposure for these assessments, net of amounts accrued, is in the range of approximately $0.5 million to $4.0 million. The Company disagrees with this assessment and has challenged it in Brazilian legal proceedings initiated by the Company against Petrobras. While the Company cannot currently estimate the amounts or timing of the resolution of these matters, the Company believes that the outcome will not have a material impact on its liquidity or financial position, but the ultimate resolution could have a material impact on its interim or annual results of operations. In addition, Petrobras and the Company had a dispute concerning late delivery of the vessels to Petrobras, for which Petrobras had notified the Company of its intention to assert late delivery penalties. The Company, in turn, asserted claims against Petrobras for its contributory actions related to the vessels' late deliveries. During the third quarter, the Company and Petrobras resolved these claims, whereby Petrobras agreed to pay the Company approximately $0.7 million.

During 2012, an Upstream customer, ATP Oil and Gas, Inc., initiated a reorganization proceeding under Chapter 11 of the United States Bankruptcy Code. Pre-petition receivables from ATP were $4.8 million, of which the Company has recorded $0.9 million in reserves. While the Company believes that the net receivables are collectible, it will continue to monitor the proceedings, which may result in actual collections that may differ materially from the current estimate.

6. Discontinued Operations

On August 29, 2013, the Company closed the sale of substantially all of the assets and business of its Downstream segment's tug and tank barge fleet to Genesis Marine, LLC, an affiliate of Genesis Energy L.P. (NYSE:GEL), for net cash proceeds of approximately of $227.5 million, after deal costs. The sale resulted in a gain of $60.0 million ($38.1 million after-tax or $1.04 per diluted share). Excluded from the sale were three older, lower-horsepower tugs considered to be non-core assets. The historical results for the Downstream segment and the gain on the sale thereof have been presented as discontinued operations for all periods in the accompanying condensed consolidated financial statements.

10

HORNBECK OFFSHORE SERVICES, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Summarized results of the Downstream segment from discontinued operations are as follows (in thousands):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Revenue	$	11,383	$	12,852	$	42,885	$	34,879
Gain on sale of assets	60,046		624		60,076		624
Operating Income	65,181		1,964		74,485		732
Income from discontinued operations, net of tax	41,368		1,224		47,162		450

As of September 30, 2013 and December 31, 2012, the aggregate components of assets and liabilities classified as discontinued operations consisted of the following (in thousands):

	As of		As of
	September 30, 2013		December 31, 2012
Assets:
Other current assets	$	90	$	1,286
Total current assets	90		1,286
Property, plant and equipment, net	818		168,487
Deferred charges, net	—		5,343
Total assets	$	908	$	175,116
Liabilities:
Accrued payroll and benefits	34		1,307
Deferred revenue	—		2,571
Other accrued liabilities	138		319
Total liabilities	$	172	$	4,197

At the closing of the sale, the Company entered into transition service agreements with Genesis to facilitate the transition of the sale of the business, including ship management agreements and a crew management agreement, pursuant to which the Company provides services related to the operation and management of the vessels as well as supplying some of the marine crews for those vessels during the transition period. The Company has been notified by Genesis of its intention to terminate the agreements upon completion of the transition of time charters that were in effect at the time of the closing.

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Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read together with our unaudited consolidated financial statements and notes to unaudited consolidated financial statements in this Quarterly Report on Form 10-Q and our audited financial statements and notes thereto included in our Annual Report on Form 10-K as of and for the year ended December 31, 2012. This discussion contains forward-looking statements that reflect our current views with respect to future events and financial performance. Our actual results may differ materially from those anticipated in these forward-looking statements. See “Forward Looking Statements” for additional discussion regarding risks associated with forward-looking statements. In this Quarterly Report on Form 10-Q, “company,” “we,” “us,” “our” or like terms refer to Hornbeck Offshore Services, Inc. and its subsidiaries, except as otherwise indicated. Please refer to Item 5—Other Information for a glossary of terms used throughout this Quarterly Report on Form 10-Q.

In this Quarterly Report on Form 10-Q, we rely on and refer to information regarding our industry from the BOEM, EIA and IHS-Petrodata, Inc. These organizations are not affiliated with us and are not aware of and have not consented to being named in this Quarterly Report on Form 10-Q. We believe this information is reliable. In addition, in many cases we have made statements in this Quarterly Report on Form 10-Q regarding our industry and our position in the industry based on our experience in the industry and our own evaluation of market conditions.

Due to the sale of substantially all of the assets and business of our Downstream segment, the financial statements, included herein, primarily represent the results of our Upstream vessels. Unless otherwise indicated, all financial or operational data relates to our continuing operations, excluding our Downstream segment, which was sold in August 2013. The historical results for the Downstream segment and the gain on the sale thereof are presented as discontinued operations for all periods.

General

The OSV market is expanding globally. Generally, offshore exploration and production activities are increasingly focused on deep wells (as defined by total well depth rather than water depth), whether on the Outer Continental Shelf or in the deepwater or ultra-deepwater. These types of wells require high-specification equipment and have resulted in an on-going newbuild cycle for drilling rigs and for high-spec OSVs. As a result of the projected deepwater drilling activity levels worldwide, there were 99 floating rigs under construction or on order on November 1, 2013 and, as of that date, there were options outstanding to build 35 additional floating rigs. In addition, on that date, there were 125 high-spec jack-up rigs under construction or on order worldwide, and there were options outstanding to build 44 additional high-spec jack-up rigs. Each drilling rig working on deep-well projects typically requires more than one OSV to service it, and the number of OSVs required per rig is dependent on many factors, including the type of activity being undertaken and the location of the rig. For example, based on the historical data for the number of floating rigs and OSVs working, we believe that two to four OSVs per rig are required in the GoM and even more OSVs are necessary per rig in Brazil where greater logistical challenges result in longer vessel turnaround times to service drill sites. Typically, during the initial drilling stage, more OSVs are required to supply drilling mud, drill pipe and other materials than at later stages of the drilling cycle. In addition, generally, more OSVs are required the farther a drilling rig is located from shore. Under normal weather conditions, the transit time to deepwater drilling rigs in the GoM and Brazil can typically range from six to 24 hours for a new generation vessel. In Brazil, transit time for a new generation vessel to some of the newer, more logistically remote deepwater drilling rig locations are more appropriately measured in days, not hours. In addition to drilling rig support, deepwater and ultra-deepwater exploration and production activities will result in the expansion of other specialty-service offerings for our vessels. These markets include subsea construction support, installation, IRM work, and life-of-field services, which include well-stimulation, workovers and decommissioning.

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Presently, our oilfield service operations are conducted in three primary geographic regions comprised of the GoM, Brazil and Mexico. Descriptions of these three regions are included below.

Gulf of Mexico

The GoM continues to be considered a world-class basin by exploration and production companies. In its Annual Energy Outlook 2013, the EIA estimated that the GoM contains 45 billion barrels of recoverable oil equivalent. According to IHS-Petrodata as of November 1, 2013, the number of floating rigs available in the GoM region is currently 43 which has increased from the pre-Macondo level of 34, because the 10 floaters that left the region and the four floaters that have been stacked or are currently being rebuilt have since been replaced by 23 vessels arriving in the region. Of the 43 rigs available in the GoM, 34 were actively drilling as of November 1, 2013. We expect at least two additional deepwater drilling units to arrive in the GoM during 2013 and 14 additional units to begin work in 2014. The rate and consistency of deepwater drilling permit approvals has improved significantly over 2011 levels.While the period of time required for BSEE to review, approve and issue drilling permits is generally longer than historical norms, our customers have indicated that the permitting process has become more repeatable and predictable.

Improvements in dayrates for our high-spec Upstream vessels continued throughout the third quarter of 2013. Leading-edge spot market OSV dayrates in the GoM for our 240 and 265 class DP-2 equipment were in the $38,000 to $45,000 range. Whether these rates can be sustained at desired levels of utilization will depend on, among other things, the future rig-count, and the pace of permitting in the GoM and the number of new vessels delivered into the GoM market from domestic shipyards or foreign markets. The Company anticipates delivery of 9 additional Jones Act-qualified DP-2 vessels from U.S. shipyards, including three being constructed by the Company during the remainder of 2013. This impact is expected to be mitigated with the announced mobilization of new drilling rigs to the GoM in the fourth quarter of 2013 and into 2014. Fleetwide effective, or utilization-adjusted, dayrates for our new generation OSVs increased $3,157, or roughly 17%, from $19,072 for the year-ago quarter to $22,229 for the third quarter of 2013. As of October 31, 2013, we have placed two vessels in-service under our ongoing 24-vessel newbuild program and we plan to take delivery of three additional newbuild vessels by the end of 2013. We expect that our DP-1 vessels will experience continued volatility as our deepwater customers continue their bias towards using only DP-2 vessels in deepwater operations. We have converted four DP-1 vessels into 240 class DP-2 vessels under our 200 class OSV retrofit program during 2013. Two additional vessels are undergoing shipyard conversion and the delivery of these vessels is expected in December 2013.

The GoM could be adversely affected by an increasing shortage of, and competition for, qualified mariners. This shortage is being exacerbated by customer and regulatory driven requirements that increase the manning levels on many vessels, including drilling units that operate in the GoM. Mariner shortages have driven up labor costs, which comprise the greatest portion of our operating costs. In the past, intense competition for licensed mariners has required the Company to unexpectedly increase our Upstream crew wages in response to across-the-board raises instituted by competitors. Such an increase usually results in a permanent increase in our annual operating costs. The most recent such increase occurred in April 2012, resulting in a quarterly operating expense increase of $5.0 million based upon the size of our mariner workforce at that time. We will also have incremental expenses due to roughly 100 mariners-in-training that are riding in the fleet and additional shoreside support staff in anticipation of the vessels that will be delivered under our fifth OSV newbuild program.

Mexico

The primary customer in the Mexican market is the state-owned oil company, PEMEX. Production from the Cantarell field, which according to the EIA is PEMEX’s largest offshore oilfield, has declined to 500,000 barrels per day from approximately 2.1 million barrels per day at its peak. In 2011, 75% of Mexico’s total crude oil production came from offshore fields located in the Bay of Campeche, including the Cantarell field and the Ku-Maloob-Zaap field. In its July 2011 Outlook, PEMEX highlighted that 49% of its prospective resources, or 26.6

13

billion barrels of oil equivalent, are in the deepwater Gulf of Mexico. However, in order to develop this resource, PEMEX will likely need to tap the expertise of non-Mexican international oil companies. Under Article 27 of the Mexican constitution, private persons or companies (other than the state-owned PEMEX) are not allowed to explore for petroleum, and solid, liquid, or gaseous hydrocarbons. As a result, while we believe that Mexico could develop into a large market for deepwater activity, we do not expect this to occur until the Mexican government has found a solution to their constitutional constraints. We believe that this situation may be improved by the July 2012 election of President Peña Nieto, who campaigned on constitutional reform to reinvigorate the Mexican oil industry. Recently, President Nieto placed legislative reform before the Mexican congress, proposing profit-sharing contracts with international oil companies that would end PEMEX's total control of the sector. We expect this reform to provide additional demand drivers in the near term. Currently, there are five floating rigs and 41 jack-up rigs drilling offshore Mexico. PEMEX has announced plans to add another floating rig and four more high-spec jack-up rigs during the remainder of 2013. We began working in Mexico in 2002 and currently have seven vessels working there under long-term contracts. We will continue to actively bid additional vessels into Mexico as tenders are issued by PEMEX.

In October 2013, the United States Senate passed a bill that would implement the United States-Mexico Transboundary Hydrocarbons Agreement. The agreement would establish rules for developing oil and gas resources along the United States' maritime border with Mexico and could help create additional resource opportunities for United States oil companies in the Gulf of Mexico. Before this bill becomes effective it must be reconciled with an earlier version passed by the House of Representatives and, if successfully reconciled, then signed by the President.

Brazil

Brazil is experiencing an increase in activity related to its large deepwater and pre-salt oilfield basins. This increase in activity is driven primarily by the state-owned oil company, Petroleo Brasileiro S.A., or Petrobras, and other producers, including BP p.l.c., Chevron Corporation, Exxon Mobil Corporation and Royal Dutch Shell plc. Petrobras has publicly announced plans to spend approximately $148 billion on exploration and production activities from 2013 through 2017 and has stated that its offshore supply vessel needs could increase from approximately 290 in 2010 to nearly 480 in 2015. Brazilian operators do not plan to add any new floating rigs by the end of 2013.

Since 2011, we have decreased our presence in Brazil from as many as 14 vessels to four vessels currently working under long-term contracts for Petrobras. We have remobilized to the GoM ten of our OSVs at the conclusion of their contracts. Current high operating costs as well as regulatory complexity and bureaucratic inefficiency are impacting our ability to generate operating margins in Brazil that are commensurate with those we are and have historically generated in the GoM. Moreover, Petrobras is the single largest consumer of our services in Brazil. As is typical with large state-owned national oil companies, contracts with Petrobras are onerous and contain multiple provisions that allow Petrobras to impose penalties and deduct payments for performance issues even if we disagree with the basis of those penalties or deductions. Petrobras has exercised these kinds of measures in our contracts and we expect that we will continue to confront similar issues with Petrobras going forward. In addition to regulatory complexity and the inherent difficulties associated with the Petrobras contracting regime, there is an acute shortage of mariners in Brazil, which we are required by law to employ on our vessels. This shortage is a significant contributor to escalating costs in Brazil and could present a barrier to our near-term growth in that market. Our long-term view in Brazil is that its preeminence as a deepwater drilling region will offer us significant opportunities, particularly as our newbuild vessels are delivered. Those vessels will have the large capacities necessary for remote and ultra-deepwater drilling regions, such as the pre-salt Brazilian market. We see Petrobras making significant investments intended to stem the logistical bottlenecks that have hampered its ability to take full advantage of its offshore fleet. As those chokepoints get worked out over the next few years, we believe that the 6,000 DWT vessels in our fifth OSV newbuild program will have a competitive advantage over 3,000 DWT vessels, which dominate Pebrobras’ fleet today.

14

Market conditions. As of November 1, 2013, we had 77% of our new generation OSV vessel-days contracted for the remainder of 2013. Our forward OSV contract coverage for the fiscal year ending December 31, 2014 currently stands at 34%. Included within our new generation contract coverage are five vessels on long-term charters with the United States government in defense capacities. With the $85 billion sequestration that went into effect March 1, 2013, it is possible that these contracts could be impacted. Our MPSV contract coverage has also increased as a result of the improving market conditions in the GoM. MPSV contract coverage for the remainder of 2013 and for 2014 is currently 83% and 47%, respectively.

The principle threats facing the Upstream market in the GoM include 1) the ability of operators and drilling contractors to comply with the new regulatory requirements; 2) the pace at which regulators approve plans and permit applications required by operators to drill; 3) the content of additional as yet unpromulgated rules that are expected to be issued; and 4) general economic conditions. In addition, there are currently 72 high-spec, Jones Act-qualified vessels under construction in U.S. shipyards that will deliver through 2016. Twenty-two of such vessels are being constructed by the Company. The level of fleet additions, if not commensurate with the level of additional drilling units, could have a negative impact on utilization and dayrates in the GoM.

All of our current Upstream vessels are qualified under the Jones Act to engage in U.S. coastwise trade, except for five foreign-flagged new generation OSVs, two foreign-flagged well stimulation vessels and two foreign-flagged MPSVs. As of September 30, 2013, our 50 active new generation OSVs and four MPSVs were operating in domestic and international areas as noted in the following table:

Operating Areas
Domestic
GoM	33
Other U.S. coastlines (1)	5
	38
Foreign
Brazil	4
Mexico	7
Middle East	2
Other Latin America	3
	16
Total Vessels (2)	54

(1) Includes five vessels that are currently supporting the military.

(2) Excluded from this table is one conventional OSV that was stacked as of September 30, 2013.

Discontinued Operations

On August 29, 2013, we closed the sale of substantially all of the assets and business of our Downstream segment's tug and tank barge fleet to Genesis Marine, LLC, an affiliate of Genesis Energy L.P. (NYSE:GEL), for net cash proceeds of approximately $227.5 million, after deal costs. The sale resulted in a gain of $60.0 million ($38.1 million after-tax or $1.04 per diluted share). Excluded from the sale were three older, lower-horsepower tugs considered to be non-core assets. The historical results for the Downstream segment and the gain on the sale thereof have been presented as discontinued operations for all periods in the accompanying condensed consolidated financial statements.

15

Critical Accounting Estimates

This Management’s Discussion and Analysis of Financial Condition and Results of Operations discusses our unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q. In many cases, the accounting treatment of a particular transaction is specifically dictated by U.S. GAAP. In other circumstances, we are required to make estimates, judgments and assumptions that we believe are reasonable based on available information. We base our estimates and judgments on historical experience and various other factors that we believe are reasonable based upon the information available. Actual results may differ from these estimates under different assumptions and conditions. Our significant accounting policies are discussed in Note 2 to our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2012.

Results of Operations

The tables below set forth the average dayrates, utilization rates and effective dayrates for our offshore supply vessels and the average number and size of vessels owned during the periods indicated. These new generation OSVs generate a substantial portion of our revenues and operating profit. Excluded from the OSV information below are the results of operations for our MPSVs, conventional vessels, our shore-base facility, and vessel management services. The Company does not provide average or effective dayrates for its MPSVs. MPSV dayrates are impacted by highly variable customer-required cost-of-sales associated with ancillary equipment and services, such as ROVs, living quarters and cranes, which are typically recovered through higher dayrates charged to the customer. Due to the fact that each of our MPSVs have a workload capacity and significantly higher income generating potential than each of the Company’s new generation OSVs, the utilization and dayrate levels of our MPSVs could have a very large impact on our results of operations. For this reason, our consolidated operating results, on a period-to-period basis, are disproportionately impacted by the level of dayrates and utilization achieved by our four MPSVs.

	Three Months Ended    September 30,						Nine Months Ended   September 30,
	2013			2012			2013			2012
New Generation Offshore Supply Vessels:
Average number of new generation OSVs (1)	50.0			51.0			50.3			51.0
Average number of active new generation OSVs (2)	50.0			48.9			49.8			47.9
Average new generation OSV fleet capacity (DWT)	130,535			128,190			128,532			128,190
Average new generation OSV capacity (DWT)	2,611			2,514			2,554			2,514
Average new generation OSV utilization rate (3)	80.7		%	79.5		%	85.2		%	82.9		%
Average new generation OSV dayrate (4)	$	27,545		$	23,990		$	26,225		$	23,248
Effective dayrate (5)	$	22,229		$	19,072		$	22,344		$	19,273

(1) We owned 50 new generation OSVs as of September 30, 2013. Excluded from this data is one stacked conventional OSV that we consider to be a non-core asset. Also excluded from this data are four MPSVs owned and operated by the Company. During October, we placed in-service one 300 class OSV, the HOS Red Rock.

(2) Active new generation OSVs represent vessels that are immediately available for service during each respective period, and exclude stacked vessels.

(3) Utilization rates are average rates based on a 365-day year. Vessels are considered utilized when they are generating revenues.

(4) Average dayrates represent average revenue per day, which includes charter hire, crewing services and net brokerage revenues, based on the number of days during the period that the OSVs generated revenue.

(5) Effective dayrate represents the average dayrate multiplied by the average utilization rate.

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Non-GAAP Financial Measures

We disclose and discuss EBITDA as a non-GAAP financial measure in our public releases, including quarterly earnings releases, investor conference calls and other filings with the Securities and Exchange Commission. We define EBITDA as earnings (net income) before interest, income taxes, depreciation and amortization. Our measure of EBITDA may not be comparable to similarly titled measures presented by other companies. Other companies may calculate EBITDA differently than we do, which may limit its usefulness as comparative measure.

We view EBITDA primarily as a liquidity measure and, as such, we believe that the GAAP financial measure most directly comparable to this measure is cash flows provided by operating activities. Because EBITDA is not a measure of financial performance calculated in accordance with GAAP, it should not be considered in isolation or as a substitute for operating income, net income or loss, cash flows provided by operating, investing and financing activities, or other income or cash flow statement data prepared in accordance with GAAP.

EBITDA is widely used by investors and other users of our financial statements as a supplemental financial measure that, when viewed with our GAAP results and the accompanying reconciliation, we believe provides additional information that is useful to gain an understanding of the factors and trends affecting our ability to service debt, pay deferred taxes and fund drydocking charges and other maintenance capital expenditures. We also believe the disclosure of EBITDA helps investors meaningfully evaluate and compare our cash flow generating capacity from quarter to quarter and year to year.

EBITDA is also a financial metric used by management (i) as a supplemental internal measure for planning and forecasting overall expectations and for evaluating actual results against such expectations; (ii) as a significant criteria for annual incentive cash compensation paid to our executive officers and bonuses paid to other shore-based employees; (iii) to compare to the EBITDA of other companies when evaluating potential acquisitions; and (iv) to assess our ability to service existing fixed charges and incur additional indebtedness.

The following table provides the detailed components of EBITDA from continuing operations as we define that term for the three and nine months ended September 30, 2013 and 2012, respectively (in thousands):

	Three Months Ended    September 30,						Nine Months Ended   September 30,
	2013			2012			2013			2012
Components of EBITDA:
Income from continuing operations	$	17,796		$	6,177		$	41,991		$	25,272
Interest expense, net
Debt obligations	11,708			14,697			38,672			42,971
Interest income	(681		)	(524		)	(1,926		)	(1,538		)
Total interest, net	11,027			14,173			36,746			41,433
Income tax expense	8,228			3,970			22,787			15,596
Depreciation	13,854			13,000			40,498			39,005
Amortization	8,582			5,289			22,265			15,287
EBITDA from continuing operations	$	59,487		$	42,609		$	164,287		$	136,593

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The following table reconciles EBITDA from continuing operations to cash flows provided by operating activities for the three and nine months ended September 30, 2013 and 2012, respectively (in thousands).

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
EBITDA Reconciliation to GAAP:
EBITDA from continuing operations	$	59,487		$	42,609		$	164,287		$	136,593
Cash paid for deferred drydocking charges	(10,435		)	(11,422		)	(25,444		)	(27,705		)
Cash paid for interest	(12,284		)	(10,378		)	(40,216		)	(28,755		)
Cash paid for taxes	(1,394		)	(235		)	(3,319		)	(964		)
Changes in working capital	27,284			18,334			38,700			3,418
Stock-based compensation expense	3,185			3,709			9,603			8,102
Loss on early extinguishment of debt	—			—			25,776			6,048
Changes in other, net	265			1,584			(1,451		)	2,017
Net cash flows provided by operating activities	$	66,108		$	44,201		$	167,936		$	98,754

In addition, we also make certain adjustments to EBITDA for loss on early extinguishment of debt, stock-based compensation expense and interest income to compute ratios used in certain financial covenants of our revolving credit facility with various lenders. We believe that these ratios are a material component of certain financial covenants in such credit agreements and failure to comply with the financial covenants could result in the acceleration of indebtedness or the imposition of restrictions on our financial flexibility.

The following table provides certain detailed adjustments to EBITDA, as defined in our revolving credit facility, for the three and nine months ended September 30, 2013 and 2012, respectively (in thousands).

Adjustments to EBITDA for Computation of Financial Ratios Used in Debt Covenants

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Loss on early extinguishment of debt	$	—	$	—	$	25,776	$	6,048
Stock-based compensation expense	3,185		3,729		9,629		8,164
Interest income	681		524		1,926		1,538

Set forth below are the material limitations associated with using EBITDA as a non-GAAP financial measure compared to cash flows provided by operating activities.

• EBITDA does not reflect the future capital expenditure requirements that may be necessary to replace our existing vessels as a result of normal wear and tear,

• EBITDA does not reflect the interest, future principal payments and other financing-related charges necessary to service the debt that we have incurred in acquiring and constructing our vessels,

• EBITDA does not reflect the deferred income taxes that we will eventually have to pay once we are no longer in an overall tax net operating loss carryforward position, as applicable, and

• EBITDA does not reflect changes in our net working capital position.

Management compensates for the above-described limitations in using EBITDA as a non-GAAP financial measure by only using EBITDA to supplement our GAAP results.

18

Summarized financial information for the three months ended September 30, 2013 and 2012, respectively, is shown below in the following table (in thousands, except percentage changes):

	Three Months Ended    September 30,						Increase (Decrease)
	2013			2012			$ Change			% Change
Revenues:
Domestic	$	101,535		$	81,963		$	19,572		23.9		%
Foreign	31,380			33,124			(1,744		)	(5.3	)	%
	132,915			115,087			17,828			15.5		%
Operating expenses	59,180			59,922			(742		)	(1.2	)	%
Depreciation and amortization	22,436			18,289			4,147			22.7		%
General and administrative expenses	14,114			12,191			1,923			15.8		%
Gain (loss) on sale of assets	3			(357		)	360			>(100)		%
Operating income	37,188			24,328			12,860			52.9		%
Interest expense	11,708			14,697			(2,989		)	(20.3	)	%
Interest income	681			524			157			30.0		%
Other expense, net	(137		)	(8		)	(129		)	>100		%
Income tax expense	8,228			3,970			4,258			>100		%
Income from continuing operations	17,796			6,177			11,619			>100		%
Income from discontinued operations, net of tax	41,368			1,224			40,144			>100		%
Net income	$	59,164		$	7,401		$	51,763		>100		%

Three Months Ended September 30, 2013 Compared to Three Months Ended September 30, 2012

Revenues. Revenues for the three months ended September 30, 2013 increased by $17.8 million, or 15.5%, to $132.9 million compared to the same period in 2012, primarily due to improved market conditions. Our weighted-average active operating fleet for the three months ended September 30, 2013 was 54 vessels compared to 53 during the same period in 2012. Our higher revenues primarily resulted from improved spot market conditions for our high-spec OSVs and MPSVs in the GoM. These higher revenues were partially offset by an increase in days out-of-service for the mobilization of four vessels to the GoM from Brazil during the current year quarter. Revenue from our four-vessel MPSV fleet increased by $3.6 million, or 14.7%, compared to the same period in 2012. Our new generation OSV average dayrates were $27,545 for the third quarter of 2013 compared to $23,990 for the same period in 2012, an increase of $3,555, or 14.8%. Our new generation OSV utilization was 80.7% for the third quarter of 2013 compared to 79.5% for the same period in 2012. Domestic revenues increased $19.6 million from the year-ago quarter due to improved spot market activity in the GoM. Foreign revenues decreased $1.7 million, or 5.3%, primarily due to an average of two fewer vessels deployed to foreign regions during the three months ended September 30, 2013 compared to the year-ago quarter. Foreign revenues for the third quarter of 2013 comprised 23.6% of our total revenues compared to 28.8% for the year-ago quarter.

Operating Expenses. Operating expenses were $59.2 million, a decrease of $0.7 million, or 1.2%, for the three months ended September 30, 2013 compared to $59.9 million for the same period in 2012. Operating expenses decreased for the three months ended September 30, 2013 primarily due to lower operating expenses related to two non-core vessels that were sold in the first half of 2013 and lower operating expenses from vessels out-of-service under our 200 class OSV retrofit program, partially offset by incremental operating costs associated with one additional 300 class newbuild that was placed in-service in June 2013. Aggregate cash operating expenses for our vessels are projected to be in the approximate annual range of $234.2 million to $237.2 million for the year ending December 31, 2013. Our cash operating expense estimate is exclusive of any additional repositioning expenses we may incur that are not recoverable through charter hire in connection with the potential relocation of more of our vessels to or from international markets; or any customer-required cost-of-sales related to future contract fixtures that are typically recovered through higher dayrates.

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Depreciation and Amortization. Depreciation and amortization was $4.1 million, or 22.7%, higher for the three months ended September 30, 2013 compared to the same period in 2012. This increase is primarily due to the full-quarter contribution of one 300 class OSV that was placed in-service during June 2013, as well as the higher cost basis of vessels redelivered to the Company under its ongoing 200 class OSV retrofit program. The increase in amortization is primarily due to more vessels reaching their initial regulatory drydocking requirements, the recertification of previously stacked vessels and a higher per-vessel average in shipyard costs for vessel regulatory drydockings given the shift in the Company's fleet mix to a higher percentage of much larger high-spec vessels. Depreciation and amortization expense is expected to continue to increase from current levels as the vessels under our current newbuild and conversion programs are placed in-service and when any newly constructed vessels undergo their initial 30-month and 60-month recertifications.

General and Administrative Expense. General and administrative, or G&A, expenses of $14.1 million, or 10.6% of revenues, increased by $1.9 million during the three months ended September 30, 2013 compared to same period in 2012. This increase in G&A expenses was primarily attributable to higher shoreside incentive compensation expense and the growth of our shoreside support team related to the Company's pending fleet growth. Our general and administrative expenses are expected to be in the approximate annual range of $54 million to $55 million for the year ending December 31, 2013, commensurate with our pending fleet growth and international operations. However, we still expect our G&A expenses as a percentage of revenues, or G&A margin, to remain within the historical range of our domestic public company OSV peer group.

Gain (Loss) on Sale of Assets. During the third quarter of 2012, we sold certain non-vessel shoreside assets that resulted in an aggregate loss of approximately $0.4 million ($0.2 million after-tax or $0.01 per diluted share). There were no Upstream vessel sales during the third quarter of 2013. The gain on sale of our Downstream segment is reflected in discontinued operations.

Operating Income. Operating income increased by $12.9 million, or 52.9%, to $37.2 million during the three months ended September 30, 2013 compared to the same period in 2012 for the reasons discussed above. Operating income as a percentage of revenues was 28.0% for the three months ended September 30, 2013 compared to 21.1% for the same period in 2012.

Interest Expense. Interest expense decreased $3.0 million during the three months ended September 30, 2013 compared to the same period in 2012. Higher capitalized interest associated with vessels under construction was the primary reason that our interest expense decreased from the prior-year quarter. During the third quarter of 2013, we capitalized interest of $8.8 million, or roughly 43% of our total interest costs, compared to capitalized interest of $2.9 million, or roughly 16% of our total interest costs for the year-ago quarter. This net decrease in interest expense, due to capitalized interest, was offset by the incurrence of an incremental $2.7 million of interest expense (including $1.3 million of incremental original issue discount) related to the issuances of additional convertible senior notes in August 2012 and senior notes in March 2013.

Interest Income. Interest income was $0.7 million during the three months ended September 30, 2013, which was in-line with the same period in 2012. Our average cash balance increased to $732.8 million for the three months ended September 30, 2013 compared to $541.2 million for the same period in 2012. The average interest rate earned on our invested cash balances was 0.4% during the three months ended September 30, 2013 and 2012, respectively. The increase in average cash balance was primarily due to our August 2012 convertible senior notes offering, which resulted in net cash proceeds of $266.0 million in the aggregate; the sale of our active Downstream fleet, which resulted in net cash proceeds of approximately $227.5 million in the aggregate, after deal costs; and our March 2013 bond refinancing, which resulted in incremental net cash proceeds of $173.9 million in the aggregate, net of the costs of the tender offer and redemption of the 2017 senior notes.

Income Tax Expense. Our effective tax rate was 35.1% and 38.9% for the three months ended September 30, 2013 and 2012, respectively. During the third quarter of 2013, our income tax expense primarily consisted

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of deferred taxes. Our income tax rate differs from the federal statutory rate primarily due to expected state tax liabilities and items not deductible for federal income tax purposes.

Income from Continuing Operations. Operating performance increased by $11.6 million for reported income from continuing operations of $17.8 million for the three months ended September 30, 2013. The higher income from continuing operations for the third quarter of 2013 was primarily due to the increase in operating income based on improved market conditions discussed above and a $3.1 million pre-tax decrease in net interest expense.

Discontinued Operations. On August 29, 2013, we closed the sale of substantially all of our Downstream assets to Genesis Marine, LLC. As a result of this transaction, the current and historical operating results of these vessels have been restated and reflected as discontinued operations. Operating income for this segment for the third quarter of 2013 included a gain on sale of assets of approximately $60.0 million ($38.1 million after-tax or $1.04 per diluted share).

The following table details financial highlights for the three months ended September 30, 2013, related to our Downstream segment that was sold in August 2013 (in thousands):

	Three Months Ended    September 30,
	2013		2012
Revenue	$	11,383	$	12,852
Gain on sale of assets	60,046		624
Operating Income	65,181		1,964
Income from discontinued operations, net of tax	41,368		1,224

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Summarized financial information for the nine months ended September 30, 2013 and 2012, respectively, is shown below in the following table (in thousands, except percentage changes):

	Nine Months Ended   September 30,						Increase (Decrease)
	2013			2012			$ Change			% Change
Revenues:
Domestic	$	302,500		$	223,006		$	79,494		35.6		%
Foreign	100,752			121,672			(20,920		)	(17.2	)	%
	403,252			344,678			58,574			17.0		%
Operating expenses	174,175			168,250			5,925			3.5		%
Depreciation and amortization	62,763			54,292			8,471			15.6		%
General and administrative expenses	40,433			33,750			6,683			19.8		%
Gain (loss) on sale of assets	1,572			(360		)	1,932			>(100)		%
Operating income	127,453			88,026			39,427			44.8		%
Loss on early extinguishment of debt	25,776			6,048			19,728			>100		%
Interest expense	38,672			42,971			(4,299		)	(10.0	)	%
Interest income	1,926			1,538			388			25.2		%
Other income (expense), net	(153		)	323			(476		)	>(100)		%
Income tax expense	22,787			15,596			7,191			46.1		%
Income from continuing operations	41,991			25,272			16,719			66.2		%
Income from discontinued operations, net of tax	47,162			450			46,712			>100		%
Net income	$	89,153		$	25,722		$	63,431		>100		%

Nine Months Ended September 30, 2013 Compared to Nine Months Ended September 30, 2012

Revenues. Revenues for the nine months ended September 30, 2013 increased by $58.6 million, or 17.0%, to $403.3 million compared to $344.7 million for the same period in 2012, primarily due to improved market conditions. Our weighted-average active operating fleet for the nine months ended September 30, 2013 was 54 vessels compared to 52 during the same period in 2012. Our higher revenues primarily resulted from increased demand for our high-spec OSVs and MPSVs in the GoM. Revenue from our four-vessel MPSV fleet for the first nine months of 2013 increased by $19.8 million, or 27.4%, compared to the same period in 2012. Our new generation OSV average dayrates were $26,225 for the first nine months of 2013 compared to $23,248 for the same period in 2012, an increase of $2,977, or 12.8%. Our new generation OSV utilization was 85.2% for the first nine months of 2013 compared to 82.9% for the same period in 2012. Our new generation OSV utilization for the first nine months of 2013 was favorably impacted by an increase in demand for our high-spec OSVs in the GoM. Domestic revenues increased $79.5 million during the first nine months of 2013 due to improved spot market activity in the GoM. Foreign revenues decreased $20.9 million, or 17.2%, primarily due to an average of four fewer vessels deployed to foreign regions during the nine months ended September 30, 2013 compared to the year-ago period. Foreign revenues for the first nine months of 2013 comprised 25.0% of our total revenues compared to 35.3% for the first nine months of 2012.

Operating Expenses. Operating expenses were $174.2 million, an increase of $5.9 million, or 3.5%, for the nine months ended September 30, 2013 compared to $168.3 million for the same period in 2012. Operating expenses were driven higher by the April 2012 mariner wage increases and by an increase in the number of active vessels in our fleet during the nine months ended September 30, 2013.

Depreciation and Amortization. Depreciation and amortization was $8.5 million, or 15.6%, higher for the nine months ended September 30, 2013 compared to the same period in 2012. This increase is primarily due to the contribution of one 300 class OSV that was placed in-service during June 2013, as well as the higher cost basis of vessels redelivered to the Company under its ongoing 200 class OSV retrofit program. The

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increase in amortization is primarily due to more vessels reaching their initial regulatory drydocking requirements, the recertification of previously stacked vessels and a higher per-vessel average in shipyard costs for vessel regulatory drydockings given the shift in the Company's fleet mix to a higher percentage of much larger high-spec vessels. Depreciation and amortization expense is expected to increase from current levels as the vessels under our current newbuild and conversion programs are placed in-service and when any newly constructed vessels undergo their initial 30-month and 60-month recertifications.

General and Administrative Expense. General and administrative expenses of $40.4 million, or 10.0% of revenues, increased by $6.7 million during the nine months ended September 30, 2013 compared to same period in 2012. This increase in G&A expenses was primarily attributable to higher shoreside incentive compensation expense. Our general and administrative expenses are expected to be in the approximate annual range of $54 million to $55 million for the year ending December 31, 2013, commensurate with our pending fleet growth. However, we still expect our G&A expenses as a percentage of revenues, or G&A margin, to remain within the historical range of our domestic public company OSV peer group.

Gain (Loss) on Sale of Assets. During the first nine months of 2013, we sold certain non-core assets that resulted in an aggregate gain of approximately $1.6 million ($1.0 million after-tax or $0.03 per diluted share). During the first nine months of 2012, we sold certain non-core assets that resulted in an aggregate loss of approximately $0.4 million ($0.2 million after-tax or $0.01 per diluted share). The gain on sale of our Downstream segment is reflected in discontinued operations.

Operating Income. Operating income increased by $39.4 million, or 44.8%, to $127.5 million during the nine months ended September 30, 2013 compared to the same period in 2012 due to the reasons discussed above. Operating income as a percentage of revenues was 31.6% for the nine months ended September 30, 2013 compared to 25.5% for the same period in 2012.

Loss on Early Extinguishment of Debt. On March 14, 2013, we commenced a cash tender offer for all of the $250.0 million in aggregate principal amount of our 2017 senior notes. Approximately 94% of such senior notes were validly tendered during the designated tender period, which ended on March 27, 2013. The remaining 2017 senior notes were redeemed on May 13, 2013. During the first nine months of 2013, we recorded a loss on early extinguishment of debt of approximately $25.8 million ($16.1 million after-tax or $0.44 per diluted share), which was comprised of the tender offer costs, the write-off of unamortized financing costs and original issue discount, and a bond redemption premium. During the first nine months of 2012, we recorded a loss on early extinguishment of debt of approximately $6.0 million ($3.7 million after-tax or $0.11 per diluted share) related to the tender offer for our 2014 senior notes.

Interest Expense. Interest expense decreased $4.3 million, or 10.0%, during the nine months ended September 30, 2013 compared to the same period in 2012. Higher capitalized interest associated with vessels under construction or conversion was the primary reason that our interest expense decreased from the year-ago period. During the first nine months of 2013, we capitalized interest of $22.2 million, or roughly 36% of our total interest costs, compared to capitalized interest of $6.4 million, or roughly 13% of our total interest costs for the year-ago period. This net decrease in interest expense, due to capitalized interest, was offset by the incurrence of an incremental $9.8 million of interest expense (including $5.5 million of incremental original issue discount) related to the issuances of additional senior notes in March 2012, convertible senior notes in August 2012, and senior notes in March 2013.

Interest Income. Interest income was $1.9 million during the nine months ended September 30, 2013, which was $0.4 million, or 25.2%, higher than the same period in 2012. Our average cash balance increased to $672.1 million for the nine months ended September 30, 2013 compared to $452.4 million for the same period in 2012. The average interest rate earned on our invested cash balances was 0.4% during the nine months ended September 30, 2013 and 2012, respectively. The increase in average cash balance was primarily due to the sale of our active Downstream fleet, which resulted in net cash proceeds of approximately $227.5 million in the aggregate, after deal costs and our March 2013 bond refinancing, which resulted in incremental net cash

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proceeds of $173.9 million in the aggregate, net of the costs of the tender offer and redemption of the 2017 senior notes.

Income Tax Expense. Our effective tax rate was 36.0% and 38.2% for the nine months ended September 30, 2013 and 2012, respectively. During the first nine months of 2013, our income tax expense primarily consisted of deferred taxes. Our income tax rate differs from the federal statutory rate primarily due to expected state tax liabilities and items not deductible for federal income tax purposes.

Income from Continuing Operations. Operating performance increased by $16.7 million for reported income from continuing operations of $42.0 million for the nine months ended September 30, 2013. The higher income from continuing operations for the first nine months of 2013 was primarily related to a $25.8 million pre-tax loss on early extinguishment of debt offset substantially by improved operating performance as discussed above.

Discontinued Operations. On August 29, 2013, we closed the sale of substantially all of our Downstream assets to Genesis Marine, LLC. As a result of this transaction, the current and historical operating results of these vessels have been restated and reflected as discontinued operations. Operating income for this segment included a gain on sale of assets of approximately $60.0 million ($38.1 million after-tax or $1.04 per diluted share). During 2013, the operating financial performance of these vessels was favorably impacted by increased demand for movements of petroleum based products in the GoM.

The following table details financial highlights for the nine months ending September 30, 2013, related to our Downstream segment that was sold in August 2013 (in thousands):

	Nine Months Ended   September 30,
	2013		2012
Revenue	$	42,885	$	34,879
Gain on sale of assets	60,076		624
Operating Income	74,485		732
Income from discontinued operations, net of tax	47,162		450

Liquidity and Capital Resources

Our capital requirements have historically been financed with cash flows from operations, proceeds from issuances of our debt and common equity securities, borrowings under our credit facilities and cash received from the sale of non-core assets. We require capital to fund on-going operations, obligations under our expanded fifth OSV newbuild program and our 200 class OSV retrofit program, vessel recertifications, discretionary capital expenditures, debt service and planned debt retirement and may require capital to fund potential future vessel construction, retrofit or conversion projects or acquisitions. The nature of our capital requirements and the types of our financing sources are not expected to change significantly for the remainder of 2013.

We have reviewed all of our debt agreements as well as our liquidity position and projected future cash needs. Despite volatility in financial and commodity markets, we remain confident in our current financial position, the strength of our balance sheet and the short- and long-term viability of our business model. To date, our liquidity has not been materially impacted and we do not expect that it will be materially impacted in the near-future due to such volatility. We believe that our cash on-hand, projected operating cash flow and, if necessary, available borrowing capacity under our revolving credit facility will be more than sufficient to operate the Company and meet all of our near-term obligations, including those described in the preceding paragraph.

As of September 30, 2013, we had total cash and cash equivalents of $797.8 million. We also have a $300 million revolving credit facility, expandable up to $500 million, which is undrawn as of September 30, 2013. Excluding any cash requirements for potential new growth opportunities that may arise, our current cash on-hand, cash proceeds from the sale of assets and our internal cash flow projections indicate that our $300

24

million undrawn revolving credit facility should not be needed to meet our liquidity needs for the foreseeable future. As of September 30, 2013, we had posted letters of credit for $0.9 million and had $299.1 million of credit available under our revolving credit facility. The full undrawn credit amount of such facility is available for all uses of proceeds, including working capital, if necessary. However, the primary intended uses of the facility are the construction or acquisition of assets that generate additional EBITDA.

In November 2013, we expect to retire $250.0 million in aggregate principal amount of our 2026 convertible senior notes with cash on-hand as of September 30, 2013. None of our other funded debt instruments mature any sooner than 2019. Our currently undrawn revolving credit facility matures in November 2016. Although we expect to continue generating positive working capital through our operations, events beyond our control, such as renewed regulatory-driven delays in the issuance of drilling plans and permits in the GoM, declines in expenditures for exploration, development and production activity, an extended reduction in domestic consumption of refined petroleum products and other reasons discussed under the “Forward Looking Statements” on page ii and the Risk Factors stated in Item 1A of our Annual Report on Form 10-K, may affect our financial condition, results of operations or cash flows.

Depending on the market demand for our vessels, long-term debt maturities and other growth opportunities that may arise, we may require additional debt or equity financing. We currently expect to generate sufficient cash flows from operations without having to use our revolving credit facility to meet our obligations under our expanded fifth OSV newbuild program, our OSV retrofit program, and scheduled recertifications of vessels. However, it is possible that, due to events beyond our control, including those described in our Risk Factors, should such need for additional financing arise, we may not be able to access the capital markets on attractive terms at that time or otherwise obtain sufficient capital to meet our maturing debt obligations or finance growth opportunities that may arise. We will continue to closely monitor our liquidity position, as well as the state of the global capital and credit markets.

During the third quarter, we closed the sale of our active Downstream fleet and related business to Genesis Marine, LLC, an affiliate of Genesis Energy L.P. (NYSE:GEL), for net cash proceeds of approximately $227.5 million, after deal costs. We expect to use the proceeds from this transaction for general corporate purposes, which may include retirement of debt or funding for the acquisition, construction or retrofit of vessels.

Cash Flows

Operating Activities. We rely primarily on cash flows from operations to provide working capital for current and future operations. Cash flows from operating activities were $167.9 million for the nine months ended September 30, 2013 and $98.8 million for the same period in 2012. Operating cash flows for the first nine months of 2013 were favorably affected by improved market conditions for our high-spec OSVs and MPSVs operating in the GoM and to a lesser extent an increase in our weighted-average operating fleet.

Investing Activities. Net cash used in investing activities was $378.6 million for the nine months ended September 30, 2013 and $162.3 million for the same period in 2012. Cash utilized during the first nine months of 2013 and 2012 primarily consisted of construction costs incurred for our fifth OSV newbuild program.

Financing Activities. Net cash provided by financing activities was $187.5 million for the nine months ended September 30, 2013 compared to cash provided by financing activities of $332.5 million for the same period in 2012. Net cash provided by financing activities for the nine months ended September 30, 2013 primarily resulted from the issuance of our 2021 senior notes. These cash inflows were partially offset by the repurchase and retirement of our 2017 senior notes. Net cash provided by financing activities for the nine months ended September 30, 2012 primarily resulted from the issuance of our 2020 senior notes, and the issuance of our 2019 convertible senior notes. These cash inflows were partially offset by the repayment of approximately $252.2 million of our 6.125% senior notes due 2014.

On March 14, 2013, we commenced a tender offer and solicitation of consents relating to the repurchase of our existing 2017 senior notes. The tender offer expired on April 10, 2013. On March 28, 2013, we

25

completed the private placement of $450 million of 2021 senior notes, resulting in offering proceeds of approximately $442.4 million, net of estimated transaction costs. In connection with the tender offer, related consent solicitation and related redemption, we used $269.3 million of such proceeds to repurchase approximately all of our outstanding $250.0 million aggregate principal amount of 2017 senior notes. The remaining net proceeds will be used for general corporate purposes, which may include retirement of other debt or funding of the acquisition, construction or retrofit of vessels. As a result of the repurchase of the 2017 senior notes during the first nine months of 2013, we recorded a pre-tax loss on early extinguishment of debt of approximately $25.8 million ($16.1 million after-tax or $0.44 per diluted share).

Discontinued Operations. For the nine months ended September 30, 2013, net cash provided by discontinued operations was $244.6 million or $236.6 million higher than the prior-year period. This increase resulted from the sale of substantially all of the assets related to the Downstream segment to Genesis Marine, LLC for approximately $230 million in gross cash proceeds.

Contractual Obligations

Debt

As of September 30, 2013, the Company had the following outstanding long-term debt (in thousands):

	Total Debt		Effective Interest Rate		Semi-Annual Cash Interest Payment		Payment Dates
5.875% senior notes due 2020 (1)	$	375,000	6.08	%	$	11,000	April 1 and October 1
5.000% senior notes due 2021 (1)	450,000		5.21	%	11,300		March 1 and September 1
1.500% convertible senior notes due 2019, net of original issue discount of $63,177	236,823		6.23	%	2,300		March 1 and September 1
1.625% convertible senior notes due 2026, net of original issue discount of $1,139 (2)	248,861		6.36	%	2,000		May 15 and November 15
	$	1,310,684

(1) The senior notes do not require any payments of principal prior to their stated maturity dates, but pursuant to the indentures under which the 2020 and 2021 senior notes were issued, we would be required to make offers to purchase such senior notes upon the occurrence of specified events, such as certain asset sales or a change in control.

(2) The notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375%, or $1.7 million semi-annually, beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes offering in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

Under our revolving credit facility, we have the option of borrowing at a variable rate of interest equal to either (i) the greater of the Prime Rate or the Federal Funds Effective Rate plus 1/2 of 1% or (ii) the London Interbank Offered Rate, or LIBOR; plus in each case an applicable margin. The applicable margin for each base rate is determined by a pricing grid, which is based on our leverage ratio, as defined in the credit agreement governing the revolving credit facility, as amended. The applicable LIBOR margin for the amended revolving credit facility ranges from 200 to 300 basis points. Unused commitment fees are payable quarterly at the annual rate of 37.5 to 50.0 basis points of the unused portion of the borrowing base of the new revolving credit facility, based on the defined leverage ratio. For additional information with respect to our revolving credit facility, our 2020 senior notes, our 2021 senior notes, our 2026 convertible senior notes, and our 2019 convertible senior notes, please refer to Note 3 of our consolidated financial statements included herein.

The credit agreement governing the revolving credit facility and the indentures governing our 2020 and 2021 senior notes impose certain operating and financial restrictions on us. Such restrictions affect, and in many cases limit or prohibit, among other things, our ability to incur additional indebtedness, make capital expenditures, redeem equity, create liens, sell assets and make dividend or other restricted payments. Based on our financial ratios for the nine months ended September 30, 2013, the full amount of the undrawn borrowing base under our revolving credit facility is available to us for all uses of proceeds, including working capital, if necessary. For the nine months ended September 30, 2013, we were in compliance with all of our debt covenants. We continuously review our debt covenants and report to our lenders our compliance with

26

financial ratios on a quarterly basis. We also consider such covenants in evaluating transactions that will have an effect on our financial ratios.

Capital Expenditures and Related Commitments

The following table sets forth the amounts incurred for our fifth OSV newbuild program, before construction period interest, during the three and nine months ended September 30, 2013 and since such program’s inception, respectively, as well as the estimated total project costs for our current expansion program (in millions):

	Three Months Ended September 30, 2013		Nine Months Ended  September 30, 2013		Incurred Since Inception		Estimated Program Totals (1)		Projected Delivery Dates (1)
Growth Capital Expenditures:
OSV newbuild program #5 (2)	$	115.9	$	328.8	$	603.4	$	1,240.0	2Q2013-4Q2016

(1) Estimated Program Totals and Projected Delivery Dates are based on internal estimates and are subject to change due to delays and possible cost overruns inherent in any large construction project, including, without limitation, shortages of equipment, lack of shipyard availability, unforeseen engineering problems, work stoppages, weather interference, unanticipated cost increases, the inability to obtain necessary certifications and approvals and shortages of materials, component equipment or skilled labor. All of the above historical and budgeted capital expenditure project amounts for our newbuild program represent estimated cash outlays and do not include any allocation of capitalized construction period interest. Projected delivery dates correspond to the first and last vessels that are contracted with shipyards for construction and delivery under our currently active program, respectively.

(2) Our fifth OSV newbuild program consists of vessel construction contracts with three domestic shipyards to build four 300 class OSVs, six 310 class OSVs, ten 320 class OSVs and four 310 class MPSVs. Delivery of the vessels to be constructed under this program is expected to occur on various dates during 2013 through 2016. Our first vessel delivered under this program, the HOS Red Dawn, was placed in service in June 2013. During October, we took delivery of one 300 class OSV, the HOS Red Rock, and we anticipate delivery of three additional HOSMAX newbuilds during the fourth quarter of 2013. We expect to own and operate 54, 67 and 69 new generation OSVs as of December 31, 2013, 2014, and 2015, respectively. These vessel additions result in a projected average new generation OSV fleet complement of 50.8, 60.7, and 68.8 vessels for the fiscal years 2013, 2014, and 2015, respectively. The Company expects to own and operate four, four, six and eight MPSVs as of December 31, 2013, 2014, 2015 and 2016 respectively. These vessel additions result in a projected average MPSV fleet complement of 4.0, 4.0, 4.8 and 7.1 vessels for the fiscal years 2013, 2014, 2015 and 2016, respectively.

The following table summarizes the costs incurred, prior to the allocation of construction period interest, for maintenance and other capital expenditures, including our OSV retrofit program, for the three and nine months ended September 30, 2013 and 2012, and a forecast for fiscal 2013 (in millions):

	Three Months Ended    September 30,				Nine Months Ended   September 30,				Year Ended December 31,
	2013		2012		2013		2012		2013
	Actual		Actual		Actual		Actual		Forecast
Maintenance and Other Capital Expenditures:
Maintenance Capital Expenditures
Deferred drydocking charges (1)	$	10.4	$	11.4	$	25.2	$	27.7	$	43.0
Other vessel capital improvements (2)	1.5		1.0		6.3		8.2		8.6
	11.9		12.4		31.5		35.9		51.6
Other Capital Expenditures
200 class OSV retrofit program (3)	15.9		2.3		37.6		2.2		47.7
Commercial-related vessel improvements (4)	0.9		1.1		2.5		2.6		19.6
Miscellaneous non-vessel additions (5)	0.5		1.6		3.5		2.6		3.9
	17.3		5.0		43.6		7.4		71.2
Total (6)	$	29.2	$	17.4	$	75.1	$	43.3	$	122.8

(1) Deferred drydocking charges for 2013 include the projected recertification costs for 18 OSVs and two MPSVs.

(2) Other vessel capital improvements include costs for discretionary vessel enhancements, which are typically incurred during a planned drydocking event to meet customer specifications.

(3) Our 200 class OSV retrofit program consists of a vessel construction contract with a domestic shipyard to upgrade and stretch six of our Super 200 class DP-1 OSVs converting them into 240 class DP-2 OSVs. The estimated total project costs for such program, which commenced in December 2012 and is expected to be completed in December 2013, is $50.0 million. These vessel improvement costs are expected to result in higher dayrates charged to customers.

(4) Commercial-related vessel improvements include items, such as cranes, ROVs, living quarters, and other specialized vessel equipment which costs are typically included in and offset, in whole or in part, by higher dayrates charged to customers.

(5) Non-vessel capital expenditures are primarily related to information technology and shoreside support initiatives.

(6) Total Maintenance and Other Capital Expenditures in the above table exclude $0 million, $3.3 million, $4.3 million, $7.8 million and $3.7 million for the three and nine months ended September 30, 2013, September 30, 2012 and the forecasted amount for the year ending December 31, 2013, respectively, from discontinued operations related to our Downstream assets that were sold on August 29, 2013.

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Forward Looking Statements

This Quarterly Report on Form 10-Q contains “forward-looking statements,” as contemplated by the Private Securities Litigation Reform Act of 1995, in which the Company discusses factors it believes may affect its performance in the future. Forward-looking statements are all statements other than historical facts, such as statements regarding assumptions, expectations, beliefs and projections about future events or conditions. You can generally identify forward-looking statements by the appearance in such a statement of words like “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “intend,” “may,” “might,” “plan,” “potential,” “predict,” “project,” “remain,” “should,” “will” or other comparable words or the negative of such words. The accuracy of the Company’s assumptions, expectations, beliefs and projections depends on events or conditions that change over time and are thus susceptible to change based on actual experience, new developments and known and unknown risks. The Company gives no assurance that the forward-looking statements will prove to be correct and does not undertake any duty to update them. The Company’s actual future results might differ from the forward-looking statements made in this Quarterly Report on Form 10-Q for a variety of reasons, including the effect of inconsistency by the United States government in the pace of issuing drilling permits and plan approvals in the GoM; the Company’s inability to successfully complete its fifth OSV newbuild program and its 200 class OSV retrofit program on-time and on-budget, which involves the construction, conversion and integration of highly complex vessels and systems; the inability to successfully market the vessels that the Company owns, is constructing or might acquire; an oil spill or other significant event in the United States or another offshore drilling region that could have a broad impact on deepwater and other offshore energy exploration and production activities, such as the suspension of activities or significant regulatory responses; the imposition of laws or regulations that result in reduced exploration and production activities or that increase the Company’s operating costs or operating requirements, including any such laws or regulations that may yet arise as a result of the Deepwater Horizon incident or the resulting drilling moratoria and regulatory reforms, as well as the outcome of pending litigation brought by environmental groups challenging exploration plans approved by the Department of Interior; less than anticipated success in marketing and operating the Company’s MPSVs presently owned or under construction; bureaucratic, administrative oroperating barriers that delay vessels chartered in foreign markets from going on-hire or result in contractual penalties or deductions imposed by foreign customers; renewed weakening of demand for the Company’s services; unplanned customer suspensions, cancellations, rate reductions or non-renewals of vessel charters or failures to finalize commitments to charter vessels; the impact of planned sequester of federal spending pursuant to the Budget Control Act of 2011; industry risks; reductions in capital spending budgets by customers; a material reduction of Petrobras’ announced plans for or administrative barriers to exploration and production activities in Brazil; sustained declines in oil and natural gas prices; further increases in operating costs, such as mariner wage increases; the inability to accurately predict vessel utilization levels and dayrates; unanticipated difficulty in effectively competing in or operating in international markets; less than anticipated subsea infrastructure demand in the GoM and other markets; the level of fleet additions by the Company and its competitors that could result in over capacity in the markets in which the Company competes; economic and political risks; weather-related risks; the shortage of or the inability to attract and retain qualified personnel, including vessel personnel for active, unstacked and newly constructed vessels; regulatory risks; the repeal or administrative weakening of the Jones Act or changes in the interpretation of the Jones Act related to the U.S. citizenship qualification; drydocking delays and cost overruns and related risks; vessel accidents, pollution incidents or other events resulting in lost revenue, fines, penalties or other expenses that are unrecoverable from insurance policies or other third parties; unexpected litigation and insurance expenses; fluctuations in foreign currency valuations compared to the U.S. dollar and risks associated with expanded foreign operations, such as non-compliance with or the unanticipated effect of tax laws, customs laws, immigration laws, or other legislation that result in higher than anticipated tax rates or other costs or the inability to repatriate foreign-sourced earnings and profits. In addition, the

28

Company’s future results may be impacted by adverse economic conditions, such as inflation, deflation, or lack of liquidity in the capital markets, that may negatively affect it or parties with whom it does business resulting in their non-payment or inability to perform obligations owed to the Company, such as the failure of customers to fulfill their contractual obligations or the failure by individual banks to provide funding under the Company’s credit agreement, if required. Should one or more of the foregoing risks or uncertainties materialize in a way that negatively impacts the Company, or should the Company’s underlying assumptions prove incorrect, the Company’s actual results may vary materially from those anticipated in its forward-looking statements, and its business, financial condition and results of operations could be materially and adversely affected. Additional factors that you should consider are set forth in detail in the “Risk Factors” section of the Company's most recent Annual Report on Form 10-K as well as other filings the Company has made and will make with the Securities and Exchange Commission which, after their filing, can be found on the Company’s website, www.hornbeckoffshore.com.

Item 3—Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes to the market risk disclosures set forth in Item 7A in our Annual Report on Form 10-K for the year ended December 31, 2012.

Item 4—Controls and Procedures

Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, our disclosure controls and procedures were effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2013 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II—OTHER INFORMATION

Item 1—Legal Proceedings

The Company is currently investigating two incidents involving the possible improper discharge of water containing oil residues into the environment. The Company voluntarily reported both instances to state and federal authorities. While the Company has not been informed of the initiation of legal proceedings against the Company, the ultimate outcome of these acts could result in legal proceedings against the Company or certain of its personnel. It is too early in our investigation to accurately assess the ultimate outcome.

Item 1A—Risk Factors

There were no changes to the risk factors previously disclosed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012.

Item 2—Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3—Defaults Upon Senior Securities

None.

Item 4—Mine Safety Disclosures

None.

Item 5—Other Information

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Glossary of Terms Currently used in our SEC Filings

"2017 senior notes" or "2017 notes" means 8.000% senior notes due 2017;

"2019 convertible senior notes" or "2019 notes" means 1.500% convertible senior notes due 2019;

"2020 senior notes" or "2020 notes" means 5.875% senior notes due 2020;

"2021 senior notes" or "2021 notes" means 5.000% senior notes due 2021;

"2026 convertible senior notes" or "2026 notes" means 1.625% convertible senior notes due 2026;

“AHTS” means anchor-handling towing supply;

“ASC” means Financial Accounting Standards Board Accounting Standards Codification;

“average dayrate” means, when referring to OSVs or MPSVs, average revenue per day, which includes charter hire, crewing services and net brokerage revenues, based on the number of days during the period that the OSVs or MPSVs, as applicable, generated revenue; and, when referring to double-hulled tank barges, the average revenue per day, including time charters, brokerage revenue, revenues generated on a per-barrel-transported basis, demurrage, shipdocking and fuel surcharge revenue, based on the number of days during the period that the tank barges generated revenue. For purposes of tank barge brokerage arrangements, this calculation excludes that portion of revenue that is equal to the cost of in-chartering third-party equipment paid by customers;

“cabotage laws” means laws pertaining to the privilege of operating vessels in the navigable waters of a nation;

“coastwise trade” means the transportation of merchandise or passengers by water, or by land and water, between points in the United States, either directly or via a foreign port;

“conventional” means, when referring to OSVs, vessels that are at least 30 years old, are generally less than 200’ in length or carry less than 1,500 deadweight tons of cargo when originally built and primarily operate, when active, on the continental shelf;

“deepwater” means offshore areas, generally 1,000’ to 5,000’ in depth;

“Deepwater Horizon incident” means the subsea blowout and resulting oil spill at the Macondo well site in the GoM in April 2010 and subsequent sinking of the Deepwater Horizon drilling rig;

“deep-well” means a well drilled to a true vertical depth of 15,000’ or greater, regardless of whether the well was drilled in the shallow water of the Outer Continental Shelf or in the deepwater or ultra-deepwater;

“DOI” means U.S. Department of the Interior and all its various sub-agencies, including effective October 1, 2011 the Bureau of Ocean Energy Management (“BOEM”), which handles offshore leasing, resource evaluation, review and administration of oil and gas exploration and development plans, renewable energy development, National Environmental Policy Act analysis and environmental studies, and the Bureau of Safety and Environmental Enforcement (“BSEE”), which is responsible for the safety and enforcement functions of offshore oil and gas operations, including the development and enforcement of safety and environmental regulations, permitting of offshore exploration, development and production activities, inspections, offshore regulatory programs, oil spill response and newly formed training and environmental compliance programs; BOEM and BSEE being successor entities to the Bureau of Ocean Energy Management, Regulation and Enforcement (“BOEMRE”), which effective June 2010 was the successor entity to the Minerals Management Service;

“domestic public company OSV peer group” includes SEACOR Holdings Inc. (NYSE:CKH), GulfMark Offshore, Inc. (NYSE:GLF) and Tidewater Inc. (NYSE:TDW);

“DP-1,” “DP-2” and “DP-3” mean various classifications of dynamic positioning systems on new generation vessels to automatically maintain a vessel’s position and heading;

“DWT” means deadweight tons;

“effective dayrate” means the average dayrate multiplied by the average utilization rate;

“EIA” means the U.S. Energy Information Administration;

“flotel” means on-vessel accommodations services, such as lodging, meals and office space;

“GAAP” means United States generally accepted accounting principles;

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“GoM” means the U.S. Gulf of Mexico;

“high-specification” or “high-spec” means, when referring to new generation OSVs, vessels with cargo-carrying capacity of greater than 2,500 DWT (i.e., 240 class OSV notations or higher), and dynamic-positioning systems with a DP-2 classification or higher; and, when referring to jack-up drilling rigs, rigs capable of working in 400-ft. of water depth or greater, with hook-load capacity of 2,000,000 lbs. or greater, with cantilever reach of 70-ft. or greater; and minimum quarters capacity of 150 berths or more and dynamic-positioning systems with a DP-2 classification or higher;

“IHS-CERA” means the division of IHS Inc. focused on providing knowledge and independent analysis on energy markets, geopolitics, industry trends and strategy;

“IHS-Petrodata” means the division of IHS Inc. focused on providing data, information, and market intelligence to the offshore energy industry;

“IRM” means inspection, repair and maintenance, also known as “IMR,” or inspection, maintenance and repair, depending on regional preference;

“Jones Act” means the U.S. cabotage laws known as the Shipping Act of 1916 and the Merchant Marine Act of 1920, as amended;

“Jones Act-qualified” means, when referring to a vessel, a U.S.-flagged vessel qualified to engage in domestic coastwise trade under the Jones Act;

“long-term contract” means a time charter of one year or longer in duration upon execution;

“Macondo” means the well site location in the deepwater GoM where the Deepwater Horizon incident occurred, as well as, where applicable, such incident itself;

“MPSV” means a multi-purpose support vessel;

“MSRC” means the Marine Spill Response Corporation;

“new generation” means, when referring to OSVs, modern, deepwater-capable vessels subject to the regulations promulgated under the International Convention on Tonnage Measurement of Ships, 1969, which was adopted by the United States and made effective for all U.S.-flagged vessels in 1992 and foreign-flagged equivalent vessels;

“OPA 90” means the Oil Pollution Act of 1990;

“OSV” means an offshore supply vessel, also known as a “PSV,” or platform supply vessel, depending on regional preference;

“PEMEX” means Petroleos Mexicanos;

“Petrobras” means Petroleo Brasileiro S.A.;

“public company OSV peer group” means SEACOR Holdings Inc. (NYSE:CKH), GulfMark Offshore, Inc. (NYSE:GLF), Tidewater Inc. (NYSE:TDW), Farstad Shipping (NO:FAR), Solstad Offshore (NO:SOFF), Deep Sea Supply (NO:DESSC), DOF ASA (NO:DOF), Siem Offshore (NO:SIOFF), Groupe Bourbon SA (GBB:FP), Havila Shipping ASA (NO:HAVI), Eidesvik Offshore (NO:EIOF) and Ezra Holdings Ltd (SI:EZRA);

“ROV” means a remotely operated vehicle;

“TTB” means ocean-going tugs and tank barges; and

“ultra-deepwater” means offshore areas, generally more than 5,000’ in depth.

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Item 6—Exhibits

Exhibit Index

Exhibit Number		Description of Exhibit
**2.1	—	Asset Purchase Agreement dated as of July 22, 2013, between Hornbeck Offshore Transportation, LLC and Genesis Marine, LLC (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed July 25, 2013).
3.1	—	Second Restated Certificate of Incorporation of the Company, as amended (incorporated by reference to Exhibit 3.1 to the Company’s Form 10-Q for the quarter ended March 31, 2005).
3.2	—	Fourth Restated Bylaws of the Company adopted June 30, 2004 (incorporated by reference to Exhibit 3.3 to the Company’s Form 10-Q for the quarter ended June 30, 2004).
3.3	—	Amendment No. 1 to Fourth Restated Bylaws of the Company adopted June 21, 2012 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed June 27, 2012).
3.4	—	Amended and Restated Certificate of Designation of Series A Junior Participating Preferred Stock filed with the Secretary of State of the State of Delaware on July 2, 2013 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed July 3, 2013).
4.1	—	Specimen stock certificates for the Company’s common stock, $0.01 par value (for U.S. citizens and non-U.S. citizens) (incorporated by reference to Exhibit 4.4 to the Company’s Form 8-A/A filed July 3, 2013, Registration No. 001-32108).
4.2	—	Indenture dated as of November 23, 2004 between the Company, the guarantors named therein and Wells Fargo Bank, National Association (as Trustee), (including form of 6.125% Series B Senior Note due 2014 ) (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed November 24, 2004).
4.3	—	Indenture dated as of November 13, 2006 by and among Hornbeck Offshore Services, Inc., the guarantors named therein, and Wells Fargo Bank, National Association, as Trustee (including form of 1.625% Convertible Senior Notes due 2026) (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.4	—	Confirmation of OTC Convertible Note Hedge dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and Jefferies International Limited (incorporated by reference to Exhibit 4.3 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.5	—	Confirmation of OTC Convertible Note Hedge dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and Bear, Stearns International Limited, as supplemented on November 9, 2006 (incorporated by reference to Exhibit 4.4 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.6	—	Confirmation of OTC Convertible Note Hedge dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and AIG-FP Structured Finance (Cayman) Limited, as supplemented on November 9, 2006 (incorporated by reference to Exhibit 4.5 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.7	—	Confirmation of OTC Warrant Confirmation dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and Jefferies International Limited (incorporated by reference to Exhibit 4.6 to the Company’s Current Report on Form 8-K filed November 13, 2006).

33

Exhibit Number		Description of Exhibit
4.8	—	Confirmation of OTC Warrant Confirmation dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and Bear, Stearns International Limited, as supplemented on November 9, 2006 (incorporated by reference to Exhibit 4.7 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.9	—	Confirmation of OTC Warrant Confirmation dated as of November 7, 2006 by and between Hornbeck Offshore Services, Inc. and AIG-FP Structured Finance (Cayman) Limited, as supplemented on November 9, 2006 (incorporated by reference to Exhibit 4.8 to the Company’s Current Report on Form 8-K filed November 13, 2006).
4.10	—	Indenture dated as of August 17, 2009 by and among Hornbeck Offshore Services, Inc., the guarantors named therein, and Wells Fargo Bank, National Association, as Trustee (including form of 8% Senior Notes due 2017) (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed August 18, 2009).
4.11	—	Indenture, dated March 16, 2012 among Hornbeck Offshore Services, Inc., as issuer, the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (including form of 5.875% Senior Notes due 2020) (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed March 21, 2012).
4.12	—	First Supplemental Indenture, dated March 30, 2012 among Hornbeck Offshore Services, Inc., the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (to the indenture governing the 1.625% Convertible Senior Notes due 2026) (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed April 4, 2012).
4.13	—	First Supplemental Indenture, dated March 30, 2012 among Hornbeck Offshore Services, Inc., the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (to the indenture governing the 8.000% Senior Notes due 2017) (incorporated by reference to Exhibit 4.3 to the Company’s Current Report on Form 8-K filed April 4, 2012).
4.14	—	Indenture dated as of August 13, 2012 by and among Hornbeck Offshore Services, Inc., the guarantors named therein, and Wells Fargo Bank, National Association, as Trustee (including form of 1.500% Convertible Senior Notes due 2019) (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.15	—	Confirmation of Base Call Option Transaction dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and Barclays Bank PLC (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.16	—	Confirmation of Base Call Option Transaction dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and JPMorgan Chase Bank, National Association, London Branch (incorporated by reference to Exhibit 4.3 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.17	—	Confirmation of Base Call Option Transaction dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.4 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.18	—	Confirmation of Additional Base Call Option Transaction dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and Barclays Bank PLC (incorporated by reference to Exhibit 4.5 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.19	—	Confirmation of Additional Base Call Option Transaction dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and JPMorgan Chase Bank, National Association, London Branch (incorporated by reference to Exhibit 4.6 to the Company’s Current Report on Form 8-K filed on August 13, 2012).

34

Exhibit Number		Description of Exhibit
4.20	—	Confirmation of Additional Base Call Option Transaction dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.7 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.21	—	Confirmation of Base Warrant dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and Barclays Bank PLC (incorporated by reference to Exhibit 4.8 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.22	—	Confirmation of Base Warrant dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and JPMorgan Chase Bank, National Association, London Branch (incorporated by reference to Exhibit 4.9 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.23	—	Confirmation of Base Warrant dated as of August 7, 2012 by and between Hornbeck Offshore Services, Inc. and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.10 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.24	—	Confirmation of Additional Warrants dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and Barclays Bank PLC (incorporated by reference to Exhibit 4.11 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.25	—	Confirmation of Additional Warrants dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.13 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.26	—	Confirmation of Additional Warrants dated as of August 8, 2012 by and between Hornbeck Offshore Services, Inc. and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.13 to the Company’s Current Report on Form 8-K filed on August 13, 2012).
4.27	—	Second Supplemental Indenture with respect to the 8.000% Notes Indenture, dated March 27, 2013 among Hornbeck Offshore Services, Inc., the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 28, 2013).
4.28	—	Indenture governing the 5.000% Notes, dated March 28, 2013 among Hornbeck Offshore Services, Inc., as issuer, the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (including form of 5.000% Senior Notes due 2021) (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed on March 28, 2013).
4.29	—	Exchange and Registration Rights Agreement, dated as of March 28, 2013, among Hornbeck Offshore Services, Inc., the guarantors party thereto and Barclays Capital Inc., as representative of the Initial Purchasers (incorporated by reference to Exhibit 4.4 to the Company’s Current Report on Form 8-K filed on March 28, 2013).
4.30	—	Rights Agreement dated as of July 1, 2013 between Hornbeck Offshore Services, Inc. and Computershare Inc., as Rights Agent, which includes as Exhibit A the Amended and Restated Certificate of Designation of Series A Preferred Stock, as Exhibit B the form of Right Certificate and as Exhibit C the form of Summary of Rights to Purchase Shares (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed July 3, 2013).
*31.1	—	Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	—	Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

35

Exhibit Number	Description of Exhibit
*32.1	Certification of the Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification of the Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*101	Interactive Data File
* Filed herewith.
** Schedules and exhibits to this agreement have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company hereby undertakes to furnish supplementally a copy of any of the omitted schedules or exhibits to the Securities and Exchange Commission upon request.

36

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Quarterly Report on Form 10-Q to be signed on its behalf by the undersigned thereunto duly authorized.

	Hornbeck Offshore Services, Inc.
Date: November 8, 2013	/s/    JAMES O. HARP, JR.
	James O. Harp, Jr.
	Executive Vice President and Chief Financial Officer

37

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Todd M. Hornbeck, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Hornbeck Offshore Services, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2013	/s/ Todd M. Hornbeck
	Todd M. Hornbeck
	Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, James O. Harp, Jr., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Hornbeck Offshore Services, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2013	/s/ James O. Harp, Jr
	James O. Harp, Jr.
	Executive Vice President and
	Chief Financial Officer (Principal Financial Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Hornbeck Offshore Services, Inc., a Delaware corporation (the “Company”), on Form 10-Q for the quarter ended September 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Todd M. Hornbeck, Chairman, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 8, 2013	/s/ Todd M. Hornbeck
	Todd M. Hornbeck
	Chairman, President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Hornbeck Offshore Services, Inc., a Delaware corporation (the “Company”), on Form 10-Q for the quarter ended September 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James O. Harp, Jr., Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 8, 2013	/s/ James O. Harp, Jr.
	James O. Harp, Jr.
	Executive Vice President and Chief Financial Officer

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Reconciliation of Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Earnings Per Share [Abstract]
Income from continuing operations	$ 17,796		$ 6,177		$ 41,991	[1]	$ 25,272	[1]
Income from discontinued operations, net of tax	41,368	[2]	1,224	[2]	47,162	[2]	450	[2]
Net income	59,164		7,401		89,153		25,722
Weighted average number of shares of common stock outstanding	36,038		35,384		35,841		35,276
Add: Net effect of dilutive stock options and unvested restricted stock	625	[3],[4],[5]	746	[3],[4],[5]	670	[3],[4],[5]	787	[3],[4],[5]
Weighted average number of dilutive shares of common stock outstanding	36,663		36,130		36,511		36,063
Earnings per common share:
Basic earnings per common share from continuing operations	$ 0.49		$ 0.18		$ 1.17		$ 0.72
Basic earnings per common share from discontinued operations	$ 1.15		$ 0.03		$ 1.32		$ 0.01
Basic earnings per common share	$ 1.64		$ 0.21		$ 2.49		$ 0.73
Diluted earnings per common share from continuing operations	$ 0.49		$ 0.17		$ 1.15		$ 0.70
Diluted earnings per common share from discontinued operations	$ 1.12		$ 0.03		$ 1.29		$ 0.01
Diluted earnings per common share	$ 1.61		$ 0.20		$ 2.44		$ 0.71
Loss on early extinguishment of debt	$ 0		$ 0		$ (25,776)		$ (6,048)

[1] Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

[2] On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

[3] For the three and nine months ended September 30, 2013 and 2012, the Company had no anti-dilutive stock options. Stock options are anti-dilutive when the exercise price of the options is greater than the average market price of the common stock for the period or when the results from operations are a net loss.

[4] Dilutive unvested restricted stock units are expected to fluctuate from quarter to quarter depending on the Company’s performance compared to a predetermined set of performance criteria. See Note 4 to these financial statements for further information regarding certain of the Company’s restricted stock grants.

[5] As of September 30, 2013 and 2012 and for the periods then ended, the 2019 convertible senior notes and 2026 convertible senior notes were not dilutive, as the average price of the Company’s stock was less than the effective conversion price of such notes.

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Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Income Statement [Abstract]
Revenues	$ 132,915		$ 115,087		$ 403,252		$ 344,678
Revenues
Operating expenses	59,180		59,922		174,175		168,250
Depreciation	13,854		13,000		40,498		39,005
Amortization	8,582		5,289		22,265		15,287
General and administrative expenses	14,114		12,191		40,433		33,750
Costs and Expenses, Total	95,730		90,402		277,371		256,292
Gain (loss) on sale of assets	3		(357)		1,572		(360)
Operating income	37,188		24,328		127,453		88,026
Other income (expense):
Loss on early extinguishment of debt	0		0		(25,776)		(6,048)
Interest income	681		524		1,926		1,538
Interest expense	(11,708)		(14,697)		(38,672)		(42,971)
Other income (expense), net	(137)		(8)		(153)		323
Nonoperating Income (Expense), Total	(11,164)		(14,181)		(62,675)		(47,158)
Income before income taxes	26,024		10,147		64,778		40,868
Income tax expense	8,228		3,970		22,787		15,596
Income from continuing operations	17,796		6,177		41,991	[1]	25,272	[1]
Income from discontinued operations, net of tax	41,368	[2]	1,224	[2]	47,162	[2]	450	[2]
Net income	$ 59,164		$ 7,401		$ 89,153		$ 25,722
Earnings per share:
Basic earnings per common share from continuing operations	$ 0.49		$ 0.18		$ 1.17		$ 0.72
Basic earnings per common share from discontinued operations	$ 1.15		$ 0.03		$ 1.32		$ 0.01
Basic earnings per common share	$ 1.64		$ 0.21		$ 2.49		$ 0.73
Diluted earnings per common share from continuing operations	$ 0.49		$ 0.17		$ 1.15		$ 0.70
Diluted earnings per common share from discontinued operations	$ 1.12		$ 0.03		$ 1.29		$ 0.01
Diluted earnings per common share	$ 1.61		$ 0.20		$ 2.44		$ 0.71
Weighted average basic shares outstanding	36,038		35,384		35,841		35,276
Weighted average diluted shares outstanding	36,663		36,130		36,511		36,063

[1] Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

[2] On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

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Incentive Compensation

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Incentive Compensation

Incentive Compensation

Stock-Based Incentive Compensation Plan

The Company’s stock-based incentive compensation plan covers a maximum of 4.2 million shares of common stock that allows the Company to grant restricted stock awards, restricted stock unit awards, or collectively restricted stock, stock options and stock appreciation rights to employees and directors.

During the nine months ended September 30, 2013, the Company granted cash-settled phantom restricted stock units, time-based restricted stock units and performance-based restricted stock units. Time-based restricted stock units were granted to executive officers and directors of the Company. Cash-settled phantom restricted stock units were granted to certain shoreside employees of the Company. Performance-based restricted stock units were granted to executive officers of the Company. The shares to be received under the performance-based restricted stock units are calculated based on the Company’s performance compared to three pre-determined criteria, as defined by the restricted stock agreements governing such awards. The actual number of shares that could be received by the award recipients can range from 0% to 100% of the Company’s awards depending on the Company’s performance. During the nine months ended September 30, 2013, the Company granted 201,745 time-based and performance-based restricted stock units and 21,490 cash-settled phantom restricted stock units.

Compensation expense related to 2013 restricted stock unit grants is recognized over the three-year service period. The fair value of the Company’s performance-based restricted stock units, which is the stock price on the date of grant, is applied to the total shares that are expected to fully vest and is amortized over the vesting period, which is generally three years, based on the Company’s internal performance measured against the pre-determined criteria, as applicable. The compensation expense related to time-based restricted stock units and cash-settled phantom restricted stock units are amortized over a vesting period of up to three years, as applicable, and is determined based on the market price of the Company’s stock on the date of grant applied to the total shares that are expected to fully vest. The cash-settled phantom restricted stock units are re-measured quarterly and classified as a liability, due to the settlement of these awards in cash. In addition to the restricted stock units granted in 2013, the Company granted performance-based and time-based restricted stock units in 2010, 2011 and 2012. During the nine months ended September 30, 2013, the Company issued 569,472 shares, in the aggregate, of stock due to: 1) employees exercising previously vested stock options, 2) vestings of restricted stock units and 3) employee purchases under the Company’s Employee Stock Purchase Plan.

The stock-based compensation expense charges from previously issued equity grants and the financial impact such grants have on the Company’s operating results are reflected in the table below (in thousands, except for per share data):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income before taxes	$	3,185	$	3,729	$	9,629	$	8,164
Net income	$	2,066	$	2,278	$	6,164	$	5,045
Earnings per common share:
Basic earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14
Diluted earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14

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Discontinued Operations - Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Aug. 29, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations and Disposal Groups [Abstract]
Net proceeds from sale of business	$ 227,500,000
Gain on sale of business	60,000,000	60,046,000	624,000	60,076,000	624,000
Gain on sale of business, net of tax	$ 38,100,000
Gain on sale of business in dollars per share	$ 1.04

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Outstanding Long-Term Debt (Detail) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Debt, carrying value	$ 1,310,684,000		$ 1,089,437,000
Less current maturities	(248,861,000)		(238,907,000)
Long-term Debt, Excluding Current Maturities	1,061,823,000		850,530,000
Senior notes, original issue discount	63,177,000		74,470,000
Senior Notes 8.000 Percent Due 2017
Debt Instrument [Line Items]
Senior Notes	0		245,229,000
Interest Rate	8.00%		8.00%
Maturity	2017		2017
Senior notes, original issue discount	0		4,771,000
Senior Notes 5.875 Percent Due 2020
Debt Instrument [Line Items]
Senior Notes	375,000,000		375,000,000
Interest Rate	5.875%		5.875%
Maturity	2020		2020
Senior Notes 5.000 Percent Due 2021
Debt Instrument [Line Items]
Senior Notes	450,000,000		0
Interest Rate	5.00%		5.00%
Maturity	2021		2021
Convertible 1.500 Percent Senior Notes Due 2019
Debt Instrument [Line Items]
Senior Notes	236,823,000		230,301,000
Interest Rate	1.50%		1.50%
Maturity	2019		2019
Senior notes, original issue discount	63,177,000		69,699,000
Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Senior Notes	248,861,000	[1]	238,907,000	[1]
Interest Rate	1.625%	[1]	1.625%	[1]
Maturity	2026	[1]	2026	[1]
Senior notes, original issue discount	1,139,000	[1]	11,093,000	[1]
Revolving Credit Facility Due 2016
Debt Instrument [Line Items]
Revolving credit facility due 2016	$ 0		$ 0
Maturity	2016		2016
Maximum [Member] | Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Interest Rate	1.625%		1.625%
Minimum [Member] | Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Interest Rate	1.375%		1.375%

[1] The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

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Discontinued Operations - Balance Sheet from Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Other current assets	$ 90	$ 1,286
Total current assets	90	1,286
Property, plant and equipment, net	818	168,487
Deferred charges, net	0	5,343
Total assets	908	175,116
Accrued payroll and benefits	34	1,307
Deferred revenue	0	2,571
Other accrued liabilities	138	319
Current liabilities from discontinued operations	$ 172	$ 4,197

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Discontinued Operations - Income Statement from Discontinued Operations (Details) (USD $)	0 Months Ended	3 Months Ended				9 Months Ended
	Aug. 29, 2013	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenue		$ 11,383		$ 12,852		$ 42,885		$ 34,879
Gain on sale of assets	60,000,000	60,046,000		624,000		60,076,000		624,000
Operating Income		65,181,000		1,964,000		74,485,000		732,000
Income from discontinued operations, net of tax		$ 41,368,000	[1]	$ 1,224,000	[1]	$ 47,162,000	[1]	$ 450,000	[1]

[1] On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Income from continuing operations	$ 41,991	[1]	$ 25,272	[1]
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Depreciation	40,498		39,005
Amortization	22,265		15,287
Stock-based compensation expense	9,603		8,102
Loss on early extinguishment of debt	25,776		6,048
Provision for bad debts	121		1,657
Deferred tax expense	15,285		15,236
Amortization of deferred financing costs	14,134		11,962
(Gain) loss on sale of assets	(1,572)		360
Changes in operating assets and liabilities:
Accounts receivable	15,433		(10,765)
Other receivables and current assets	7,465		(318)
Deferred drydocking charges	(25,444)		(27,705)
Accounts payable	(11,114)		8,853
Accrued liabilities and other liabilities	13,113		(1,391)
Accrued interest	382		7,151
Net cash provided by operating activities	167,936		98,754
CASH FLOWS FROM INVESTING ACTIVITIES:
Costs incurred for OSV newbuild program 5	(344,909)		(149,625)
Net proceeds from sale of assets	16,118		3,002
Vessel capital expenditures	(46,372)		(13,054)
Non-vessel capital expenditures	(3,459)		(2,601)
Net cash used in investing activities	(378,622)		(162,278)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax benefit from share-based payments	5,127		0
Repayment of senior notes	(250,000)		(300,000)
Proceeds from the issuance of senior notes	450,000		375,000
Premium on the retirement of debt	(17,658)		(3,692)
Payments for public offering of common stock	0		(180)
Purchase of hedge on convertible senior notes	0		(73,032)
Sale of common stock warrants	0		48,237
Proceeds from the issuance of convertible senior notes	0		300,000
Deferred financing costs	(7,771)		(16,451)
Net cash proceeds from other shares issued	7,840		2,579
Net cash provided by financing activities	187,538		332,461
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash provided by operating activities	15,996		9,682
Net cash provided by (used in) investing activities	228,576		(1,698)
Net cash provided by discontinued operations	244,572		7,984
Effects of exchange rate changes on cash	(318)		(156)
Net increase in cash and cash equivalents	221,106		276,765
Cash and cash equivalents at beginning of period	576,678		356,849
Cash and cash equivalents at end of period	797,784		633,614
SUPPLEMENTAL DISCLOSURES OF CASH FLOW ACTIVITIES:
Cash paid for interest	40,216		28,755
Cash paid for income taxes	$ 3,319		$ 964

[1] Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

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Earnings Per Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Basic earnings per common share was calculated by dividing income from continuing operations and income from discontinued operations by the weighted average number of common shares outstanding during the period. Diluted earnings per common share was calculated by dividing income from continuing operations and income from discontinued operations by the weighted average number of common shares outstanding during the year plus the effect of dilutive stock options and restricted stock unit awards. Weighted average number of common shares outstanding was calculated by using the sum of the shares determined on a daily basis divided by the number of days in the period. The table below reconciles the Company’s earnings per share (in thousands, except for per share data): 

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income from continuing operations (1)	$	17,796	$	6,177	$	41,991	$	25,272
Income from discontinued operations, net of tax (2)	41,368		1,224		47,162		450
Net income	$	59,164	$	7,401	$	89,153	$	25,722
Weighted average number of shares of common stock outstanding	36,038		35,384		35,841		35,276
Add: Net effect of dilutive stock options and unvested restricted stock (3)(4)(5)	625		746		670		787
Weighted average number of dilutive shares of common stock outstanding	36,663		36,130		36,511		36,063
Earnings per common share:
Basic earnings per common share from continuing operations	$	0.49	$	0.18	$	1.17	$	0.72
Basic earnings per common share from discontinued operations	1.15		0.03		1.32		0.01
Basic earnings per common share	$	1.64	$	0.21	$	2.49	$	0.73
Diluted earnings per common share from continuing operations	$	0.49	$	0.17	$	1.15	$	0.70
Diluted earnings per common share from discontinued operations	1.12		0.03		1.29		0.01
Diluted earnings per common share	$	1.61	$	0.20	$	2.44	$	0.71

(1) Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

(2) On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

(3) For the three and nine months ended September 30, 2013 and 2012, the Company had no anti-dilutive stock options. Stock options are anti-dilutive when the exercise price of the options is greater than the average market price of the common stock for the period or when the results from operations are a net loss.

(4) As of September 30, 2013 and 2012 and for the periods then ended, the 2019 convertible senior notes and 2026 convertible senior notes were not dilutive, as the average price of the Company’s stock was less than the effective conversion price of such notes.

(5) Dilutive unvested restricted stock units are expected to fluctuate from quarter to quarter depending on the Company’s performance compared to a predetermined set of performance criteria. See Note 4 to these financial statements for further information regarding certain of the Company’s restricted stock grants.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Vessel Construction

In November 2011, the Company announced, and has since expanded, its fifth OSV newbuild program. This program now consists of vessel construction contracts with three domestic shipyards to build four 300 class OSVs, six 310 class OSVs, ten 320 class OSVs and four 310 class MPSVs. As of October 31, 2013, the Company has placed two vessels in-service under its fifth newbuild program. The 22 remaining vessels under this 24-vessel domestic newbuild program are currently expected to be placed in service as follows: three more in 2013, 13 in 2014, four in 2015 and two in 2016. Based on current contracts and internal estimates, the aggregate total cost of this program, before construction period interest, is expected to be approximately $1,240.0 million. As of September 30, 2013, the Company had incurred construction costs of approximately $603.4 million, or 48.7%, since the inception of its fifth OSV newbuild program.

200 Class OSV Retrofit Program

In September 2012, the Company awarded a contract for the upgrading and stretching of six of the Company’s Super 200 class DP-1 OSVs, converting them into 240 class DP-2 OSVs. The project costs for these discretionary vessel modifications are expected to be approximately $50.0 million, in the aggregate ($8.3 million each), and the Company expects to incur approximately 799 vessel-days of aggregate commercial downtime for the six vessels (roughly 133 vessel-days each). Two vessels each were re-delivered to the Company in May and September 2013 and the current schedule projects re-deliveries of the last two vessels in December 2013. As of September 30, 2013, the Company had incurred construction costs of approximately $39.9 million, or 80%, since the inception of its 200 class OSV retrofit program.

Contingencies

In the normal course of its business, the Company becomes involved in various claims and legal proceedings in which monetary damages are sought. It is management’s opinion that the Company’s liability, if any, under such claims or proceedings would not materially affect its financial position, results of operations, or cash flows. The Company insures against losses relating to its vessels, pollution and third party liabilities, including claims by employees under Section 33 of the Merchant Marine Act of 1920, or the Jones Act. Third party liabilities and pollution claims that relate to vessel operations are covered by the Company’s entry in a mutual protection and indemnity association, or P&I Club, as well as by marine liability policies in excess of the P&I Club’s coverage. The Company provides reserves for any individual claim deductibles for which the Company remains responsible by using an estimation process that considers Company-specific and industry data, as well as management’s experience, assumptions and consultation with outside counsel. As additional information becomes available, the Company will assess the potential liability related to its pending claims and revise its estimates. Although revisions to such estimates historically have not been material, changes in estimates of the potential liability could materially impact the Company’s results of operations, financial position or cash flows.

During 2010 and 2011, the Company mobilized 12 vessels, in the aggregate, to Brazil to operate under long-term contracts for Petrobras. These vessel charters with Petrobras include limitations regarding fuel consumption. Petrobras has asserted claims against the Company relating to excess fuel consumption. The Company’s exposure for these assessments, net of amounts accrued, is in the range of approximately $0.5 million to $4.0 million. The Company disagrees with this assessment and has challenged it in Brazilian legal proceedings initiated by the Company against Petrobras. While the Company cannot currently estimate the amounts or timing of the resolution of these matters, the Company believes that the outcome will not have a material impact on its liquidity or financial position, but the ultimate resolution could have a material impact on its interim or annual results of operations. In addition, Petrobras and the Company had a dispute concerning late delivery of the vessels to Petrobras, for which Petrobras had notified the Company of its intention to assert late delivery penalties. The Company, in turn, asserted claims against Petrobras for its contributory actions related to the vessels' late deliveries. During the third quarter, the Company and Petrobras resolved these claims, whereby Petrobras agreed to pay the Company approximately $0.7 million.

During 2012, an Upstream customer, ATP Oil and Gas, Inc., initiated a reorganization proceeding under Chapter 11 of the United States Bankruptcy Code. Pre-petition receivables from ATP were $4.8 million, of which the Company has recorded $0.9 million in reserves. While the Company believes that the net receivables are collectible, it will continue to monitor the proceedings, which may result in actual collections that may differ materially from the current estimate.

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Long-Term Debt

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt

As of the dates indicated, the Company had the following outstanding long-term debt (in thousands):

	September 30, 2013			December 31, 2012
8.000% senior notes due 2017, net of original issue discount of $4,771	$	—		$	245,229
5.875% senior notes due 2020	375,000			375,000
5.000% senior notes due 2021	450,000			—
1.500% convertible senior notes due 2019, net of original issue discount of $63,177 and $69,699	236,823			230,301
1.625% convertible senior notes due 2026, net of original issue discount of $1,139 and $11,093 (1)	248,861			238,907
Revolving credit facility due 2016	—			—
	1,310,684			1,089,437
Less current maturities	(248,861		)	(238,907		)
	$	1,061,823		$	850,530

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

The table below summarizes the Company's cash interest payments (in thousands):

	Semi-Annual Cash Interest Payment		Payment Dates
5.875% senior notes due 2020	$	11,000	April 1 and October 1
5.000% senior notes due 2021	11,300		March 1 and September 1
1.500% convertible senior notes due 2019	2,300		March 1 and September 1
1.625% convertible senior notes due 2026 (1)	2,000		May 15 and November 15

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

On March 14, 2013, the Company commenced a cash tender offer for all of the outstanding $250.0 million aggregate principal amount of its 2017 senior notes. Senior notes totaling approximately 94% of the 2017 senior notes outstanding, were validly tendered during the designated tender period and were repurchased at 107.12% of par on March 28, 2013. The remaining 2017 senior notes were redeemed at 106.20% of par on May 13, 2013. A loss on early extinguishment of debt for the 2017 senior notes of approximately $24.3 million was recorded during the first quarter of 2013, which includes the tender offer costs, an allocable portion of the write-off of unamortized financing costs and original issue discount, and a bond redemption premium. A loss on early extinguishment of debt of approximately $1.5 million was recorded during the second quarter of 2013 for those costs allocable to the 2017 senior notes redeemed on May 13, 2013.

On March 14, 2013, the Company issued $450.0 million in aggregate principal amount of 2021 senior notes. The net proceeds to the Company from the offering were approximately $442.4 million, net of estimated transaction costs. The Company used $252.7 million of such proceeds to repurchase approximately 94% of the outstanding 2017 senior notes pursuant to its tender offer noted above. The Company used approximately $16.6 million of proceeds on May 13, 2013 to redeem the remaining 6% of the outstanding 2017 senior notes pursuant to the redemption noted above. The remaining proceeds are available for general corporate purposes, which may include funding for the acquisition, construction or retrofit of vessels. The 2021 senior notes mature on March 1, 2021 and require semi-annual interest payments of $11.3 million due and payable each March 1 and September 1 of each year until maturity, commencing September 1, 2013. The effective interest rate on the new senior notes is 5.21%. No principal payments are due until maturity.

Pursuant to a registeredexchange offer, the 2021 senior notes issued in March 2013 that were initially sold pursuant to private placements were exchanged by the holders for 2021 senior notes with substantially the same terms, except that the issuance of the 2021 senior notes in the exchange offer was registered under the Securities Act of 1933, as amended, or the Securities Act. The original 2021 senior notes and the similar notes exchanged were issued under and are entitled to the benefits of the same 2013 indenture. Holders of the 2021 senior notes are entitled to certain registration rights as set forth in an exchange and registration rights agreement dated as of March 28, 2013.

The 2021 senior notes are senior unsecured obligations and rank equally in right of payment with other existing and future senior indebtedness and senior in right of payment to any subordinated indebtedness that may be incurred by the Company in the future. The 2021 senior notes are guaranteed by certain of the Company’s subsidiaries. The guarantees are full and unconditional, joint and several, and all of the Company’s non-guarantor subsidiaries are minor as defined in the Securities and Exchange Commission regulations. Hornbeck Offshore Services, Inc., as the parent company issuer of the 2021 senior notes, has no independent assets or operations other than its ownership interest in its subsidiaries and affiliates. There are no significant restrictions on the Company’s ability, or the ability of any guarantor, to obtain funds from its subsidiaries by such means as a dividend or loan.

The Company may, at its option, redeem all or part of the 2021 senior notes from time to time at specified redemption prices and subject to certain conditions required by the indenture governing the 2021 senior notes. The Company is permitted under the terms of the indenture to incur additional indebtedness in the future, provided that certain financial conditions set forth in the indenture are satisfied by the Company.

On September 13, 2013, the Company issued a notice of redemption for all of the outstanding $250 million aggregate principal amount of its 2026 convertible senior notes. The Company has elected to redeem the 2026 notes on November 15, 2013, or the Redemption Date, at a redemption price of 100% of the principal amount thereof and accrued and unpaid interest to, but excluding, the Redemption Date. Holders may convert the 2026 notes at any time prior to the close of business on November 12, 2013, at a conversion rate of 20.6260 shares of the Company's common stock per $1,000 principal amount of 2026 notes, which equates to a conversion price of $48.48 per share, with a related Observation Period (as defined in the Indenture governing the 2026 notes) of October 8, 2013 through November 11, 2013. For those holders that elect to convert their 2026 notes in connection with the redemption, the Company will satisfy its conversion obligations to holders by paying cash equal to the aggregate principal amount of the 2026 notes converted and delivering shares of common stock in settlement of any and all conversion obligations in excess of the principal amount (provided that the Company will pay cash in lieu of issuing fractional shares). For those holders that elect to convert their 2026 notes, the counterparties to the previously disclosed convertible note hedge transactions entered into in 2006 concurrently with the pricing of the 2026 notes will deliver common stock that will reduce or prevent equity dilution that would otherwise result from the conversion. The Company expects to meet any cash payment obligations related to the redemption or conversion with cash currently on-hand.

In addition to the convertible note hedge transactions entered into in 2006, the Company entered into separate warrant transactions, or warrants, whereby it sold to the counterparties warrants to acquire, subject to customary anti-dilution adjustments, approximately 4.5 million shares of the Company's common stock at a strike price equal to $62.59 per share of common stock. On exercise of the warrants, the Company has the option to deliver cash or shares of its common stock equal to the difference between the then-market price and strike price per share of common stock. The warrants expire in a series of tranches beginning February 13, 2014 through the 30^th trading day thereafter.

The Company has an undrawn senior secured revolving credit facility, with a borrowing base of $300.0 million and an accordion feature that allows for the potential expansion of the facility up to an aggregate of $500.0 million. The facility matures in November 2016.

Under the Company’s revolving credit facility, it has the option of borrowing at a variable rate of interest equal to either (i) LIBOR, plus an applicable margin, or (ii) the greatest of the Prime Rate, the Federal Funds Effective Rate plus  ¹/₂ of 1% and the one-month LIBOR plus 1%, plus in each case an applicable margin. The applicable margin for each base rate is determined by a pricing grid, which is based on the Company’s leverage ratio, as defined in the credit agreement governing the amended revolving credit facility. Unused commitment fees are payable quarterly at the annual rate ranging from 37.5 basis points to 50.0 basis points as determined by a pricing grid.

As of September 30, 2013, there were no amounts drawn under the Company’s $300.0 million revolving credit facility and $0.9 million posted as letters of credit. As of September 30, 2013, the Company was in compliance with all financial covenants required by its revolving credit facility and the full amount of the undrawn borrowing base under the facility was available to the Company for all permissible uses of proceeds, including working capital, if necessary.

The Company estimates the fair value of its 2020 senior notes, 2021 senior notes, 2019 convertible senior notes and 2026 convertible senior notes by primarily using quoted market prices. The fair value of the Company’s revolving credit facility, when there are outstanding balances, approximates its carrying value. The face value, carrying value and fair value of the Company’s total debt was $1,375.0 million, $1,310.7 million and $1,493.2 million, respectively, as of September 30, 2013. Given the observability of the inputs to these estimates, the fair values presented for long-term debt have been assigned a Level 2, of the three-level valuation hierarchy.

Capitalized Interest

During the three and nine months ended September 30, 2013, the Company capitalized approximately $8.8 million and $22.2 million respectively, of interest costs related to the construction of vessels. During the three and nine months ended September 30, 2012, the Company capitalized approximately $2.9 million and $6.4 million respectively, of interest costs related to the construction of vessels.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 3,149	$ 3,028
Current portion of long-term debt, net of original issue discount	1,139	11,093
Long-term debt, net of original issue discount	$ 63,177	$ 74,470
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized	5,000,000	5,000,000
Preferred stock issued	0	0
Preferred stock outstanding	0	0
Common stock Par Value (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized	100,000,000	100,000,000
Common stock issued	36,048,000	35,479,000
Common stock outstanding	36,048,000	35,479,000

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Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Outstanding Long-Term Debt

As of the dates indicated, the Company had the following outstanding long-term debt (in thousands):

	September 30, 2013			December 31, 2012
8.000% senior notes due 2017, net of original issue discount of $4,771	$	—		$	245,229
5.875% senior notes due 2020	375,000			375,000
5.000% senior notes due 2021	450,000			—
1.500% convertible senior notes due 2019, net of original issue discount of $63,177 and $69,699	236,823			230,301
1.625% convertible senior notes due 2026, net of original issue discount of $1,139 and $11,093 (1)	248,861			238,907
Revolving credit facility due 2016	—			—
	1,310,684			1,089,437
Less current maturities	(248,861		)	(238,907		)
	$	1,061,823		$	850,530

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

The table below summarizes the Company's cash interest payments (in thousands):

	Semi-Annual Cash Interest Payment		Payment Dates
5.875% senior notes due 2020	$	11,000	April 1 and October 1
5.000% senior notes due 2021	11,300		March 1 and September 1
1.500% convertible senior notes due 2019	2,300		March 1 and September 1
1.625% convertible senior notes due 2026 (1)	2,000		May 15 and November 15

(1) The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

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Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net Income	$ 59,164	$ 7,401	$ 89,153	$ 25,722
Other comprehensive income, net of tax:
Foreign currency translation income (loss)	5	(59)	(318)	(156)
Total comprehensive income	$ 59,169	$ 7,342	$ 88,835	$ 25,566

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 797,784	$ 576,678
Accounts receivable, net of allowance for doubtful accounts of $3,149 and $3,028, respectively	88,132	103,265
Deferred tax assets, net	51,602	28,720
Other current assets	16,390	21,560
Current assets from discontinued operations	90	1,286
Total current assets	953,998	731,509
Property, plant and equipment, net	2,000,890	1,643,623
Deferred charges, net	76,797	69,492
Other assets	12,605	13,277
Long-term assets from discontinued operations	818	173,830
Total assets	3,045,108	2,631,731
Current liabilities:
Accounts payable	53,997	48,286
Accrued interest	15,171	14,790
Accrued payroll and benefits	14,846	12,441
Deferred revenue	24,636	16,854
Current portion of long-term debt, net of original issue discount of $1,139 and $11,093, respectively	248,861	238,907
Other accrued liabilities	17,104	8,030
Current liabilities from discontinued operations	172	4,197
Total current liabilities	374,787	343,505
Long-term debt, net of original issue discount of $63,177 and $74,470, respectively	1,061,823	850,530
Deferred tax liabilities, net	334,070	270,478
Other liabilities	4,527	1,373
Total liabilities	1,775,207	1,465,886
Stockholders’ equity:
Preferred stock: $0.01 par value; 5,000 shares authorized; no shares issued and outstanding	0	0
Common stock: $0.01 par value; 100,000 shares authorized; 36,048 and 35,479 shares issued and outstanding, respectively	360	355
Additional paid-in-capital	720,874	705,658
Retained earnings	549,243	460,090
Accumulated other comprehensive loss	(576)	(258)
Total stockholders’ equity	1,269,901	1,165,845
Total liabilities and stockholders’ equity	$ 3,045,108	$ 2,631,731

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		9 Months Ended	12 Months Ended		1 Months Ended	9 Months Ended					1 Months Ended							9 Months Ended
	Dec. 31, 2012	Sep. 30, 2013 Brazil	Dec. 31, 2011 Brazil Vessel	Dec. 31, 2010 Brazil Vessel	Nov. 30, 2011 Newbuild program #5 Program Shipyard	Sep. 30, 2013 Newbuild program #5 Vessel	Sep. 30, 2013 Newbuild program #5 Fiscal Year 2013 Vessel	Sep. 30, 2013 Newbuild program #5 Fiscal Year 2014 Vessel	Sep. 30, 2013 Newbuild program #5 Fiscal Year 2015 Vessel	Sep. 30, 2013 Newbuild program #5 Fiscal Year 2016 Vessel	Nov. 30, 2011 Newbuild program #5 Offshore Supply Vessel Class 300 Vessel	Nov. 30, 2011 Newbuild program #5 Offshore Supply Vessel Class 310 Vessel	Nov. 30, 2011 Newbuild program #5 Offshore Supply Vessel Class 320 Vessel	Nov. 30, 2011 Newbuild program #5 Multi Purpose Supply Vessel Class 310 Vessel Vessel	Sep. 30, 2013 OSV Retrofit Program 200 class DP-1 Offshore Supply Vessels Vessel	May 31, 2013 OSV Retrofit Program 200 class DP-1 Offshore Supply Vessels Vessel	Sep. 30, 2012 OSV Retrofit Program 200 class DP-1 Offshore Supply Vessels Vessel	Sep. 30, 2013 OSV Retrofit Program 200 class DP-1 Offshore Supply Vessels Vessel
Commitments and Contingencies Disclosure [Line Items]
Number Of Ship Construction Programs					5
Number Of Construction Shipyards, Domestic					3
Number of vessels to be constructed						22					4	6	10	4
Number of vessels expected to be placed in service						24	3	13	4	2
Aggregate cost of OSV newbuild program excluding construction period interest						$ 1,240.0
Cost incurred on OSV newbuild program						603.4
Percentage of total project cost						48.70%												80.00%
Number of vessels to upgrade and stretch																	6
Aggregate cost of OSV retrofit program																	50.0
Cost of OSV retrofit program, per vessel																	8.3
Aggregate vessel-days of commercial downtime																	799 days
Vessel-days of commercial downtime, per vessel																	133 days
Number of vessels re-delivered for upgrade and stretch															2	2
Number Of vessels to be redelivered for upgrade and stretch																		2
Cost incurred on OSV retrofit program																		39.9
Number of vessels mobilized to Brazil to operate under long term contracts for Petrobras			12	12
Company's exposure to claims, net of amount accrued, low range		0.5
Company's exposure to claims, net of amount accrued, high range		4.0
Amount received in settlement of claims		0.7
Amount owed by ATP	4.8
Amount owed by ATP, reserves	$ 0.9

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Reconciliation of Earnings Per Share

The table below reconciles the Company’s earnings per share (in thousands, except for per share data): 

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income from continuing operations (1)	$	17,796	$	6,177	$	41,991	$	25,272
Income from discontinued operations, net of tax (2)	41,368		1,224		47,162		450
Net income	$	59,164	$	7,401	$	89,153	$	25,722
Weighted average number of shares of common stock outstanding	36,038		35,384		35,841		35,276
Add: Net effect of dilutive stock options and unvested restricted stock (3)(4)(5)	625		746		670		787
Weighted average number of dilutive shares of common stock outstanding	36,663		36,130		36,511		36,063
Earnings per common share:
Basic earnings per common share from continuing operations	$	0.49	$	0.18	$	1.17	$	0.72
Basic earnings per common share from discontinued operations	1.15		0.03		1.32		0.01
Basic earnings per common share	$	1.64	$	0.21	$	2.49	$	0.73
Diluted earnings per common share from continuing operations	$	0.49	$	0.17	$	1.15	$	0.70
Diluted earnings per common share from discontinued operations	1.12		0.03		1.29		0.01
Diluted earnings per common share	$	1.61	$	0.20	$	2.44	$	0.71

(1) Income from continuing operations for the nine months ended September 30, 2013 includes a loss on early extinguishment of debt of $25.8 million. Income from continuing operations for the nine months ended September 30, 2012 includes a loss on early extinguishment of debt of $6.0 million. See Note 3 for further information regarding the Company’s debt.

(2) On August 29, 2013, the Company closed the sale of its Downstream segment. See Note 6 for further discussion of this transaction.

(3) For the three and nine months ended September 30, 2013 and 2012, the Company had no anti-dilutive stock options. Stock options are anti-dilutive when the exercise price of the options is greater than the average market price of the common stock for the period or when the results from operations are a net loss.

(4) As of September 30, 2013 and 2012 and for the periods then ended, the 2019 convertible senior notes and 2026 convertible senior notes were not dilutive, as the average price of the Company’s stock was less than the effective conversion price of such notes.

(5) Dilutive unvested restricted stock units are expected to fluctuate from quarter to quarter depending on the Company’s performance compared to a predetermined set of performance criteria. See Note 4 to these financial statements for further information regarding certain of the Company’s restricted stock grants.

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Discontinued Operations, Income Statement and Balance Sheet

Summarized results of the Downstream segment from discontinued operations are as follows (in thousands):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Revenue	$	11,383	$	12,852	$	42,885	$	34,879
Gain on sale of assets	60,046		624		60,076		624
Operating Income	65,181		1,964		74,485		732
Income from discontinued operations, net of tax	41,368		1,224		47,162		450

As of September 30, 2013 and December 31, 2012, the aggregate components of assets and liabilities classified as discontinued operations consisted of the following (in thousands):

	As of		As of
	September 30, 2013		December 31, 2012
Assets:
Other current assets	$	90	$	1,286
Total current assets	90		1,286
Property, plant and equipment, net	818		168,487
Deferred charges, net	—		5,343
Total assets	$	908	$	175,116
Liabilities:
Accrued payroll and benefits	34		1,307
Deferred revenue	—		2,571
Other accrued liabilities	138		319
Total liabilities	$	172	$	4,197

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Discontinued Operations

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

Discontinued Operations

On August 29, 2013, the Company closed the sale of substantially all of the assets and business of its Downstream segment's tug and tank barge fleet to Genesis Marine, LLC, an affiliate of Genesis Energy L.P. (NYSE:GEL), for net cash proceeds of approximately of $227.5 million, after deal costs. The sale resulted in a gain of $60.0 million ($38.1 million after-tax or $1.04 per diluted share). Excluded from the sale were three older, lower-horsepower tugs considered to be non-core assets. The historical results for the Downstream segment and the gain on the sale thereof have been presented as discontinued operations for all periods in the accompanying condensed consolidated financial statements.

Summarized results of the Downstream segment from discontinued operations are as follows (in thousands):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Revenue	$	11,383	$	12,852	$	42,885	$	34,879
Gain on sale of assets	60,046		624		60,076		624
Operating Income	65,181		1,964		74,485		732
Income from discontinued operations, net of tax	41,368		1,224		47,162		450

As of September 30, 2013 and December 31, 2012, the aggregate components of assets and liabilities classified as discontinued operations consisted of the following (in thousands):

	As of		As of
	September 30, 2013		December 31, 2012
Assets:
Other current assets	$	90	$	1,286
Total current assets	90		1,286
Property, plant and equipment, net	818		168,487
Deferred charges, net	—		5,343
Total assets	$	908	$	175,116
Liabilities:
Accrued payroll and benefits	34		1,307
Deferred revenue	—		2,571
Other accrued liabilities	138		319
Total liabilities	$	172	$	4,197

At the closing of the sale, the Company entered into transition service agreements with Genesis to facilitate the transition of the sale of the business, including ship management agreements and a crew management agreement, pursuant to which the Company provides services related to the operation and management of the vessels as well as supplying some of the marine crews for those vessels during the transition period. The Company has been notified by Genesis of its intention to terminate the agreements upon completion of the transition of time charters that were in effect at the time of the closing.

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Basis of Presentation

9 Months Ended

Sep. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited consolidated financial statements do not include certain information and footnote disclosures required by United States generally accepted accounting principles, or GAAP. The interim financial statements and notes are presented as permitted by instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments necessary for a fair presentation of the interim financial statements have been included and consist only of normal recurring items. The unaudited quarterly financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Annual Report on Form 10-K of Hornbeck Offshore Services, Inc. (together with its subsidiaries, the “Company”) for the year ended December 31, 2012. The results of operations for the nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. Certain reclassifications have been made to prior period results to conform to current year presentation. The most significant of these reclassifications are associated with the Company's discontinued operations. As discussed further in Note 6, the Company sold substantially all of its Downstream assets in August 2013.

The consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements.

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Long-Term Debt Cash Interest Payments on Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Senior Notes 8.000 Percent Due 2017
Debt Instrument [Line Items]
Interest Rate	8.00%		8.00%
Senior Notes 5.875 Percent Due 2020
Debt Instrument [Line Items]
Interest Rate	5.875%		5.875%
Semi-Annual Cash Interest Payment	$ 11,000
Senior Notes 5.000 Percent Due 2021
Debt Instrument [Line Items]
Interest Rate	5.00%		5.00%
Semi-Annual Cash Interest Payment	11,300
Convertible 1.500 Percent Senior Notes Due 2019
Debt Instrument [Line Items]
Interest Rate	1.50%		1.50%
Semi-Annual Cash Interest Payment	2,300
Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Interest Rate	1.625%	[1]	1.625%	[1]
Semi-Annual Cash Interest Payment	$ 2,000	[1]
Maximum [Member] | Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Interest Rate	1.625%		1.625%
Minimum [Member] | Convertible 1.625 Percent Senior Notes Due 2026
Debt Instrument [Line Items]
Interest Rate	1.375%		1.375%

[1] The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

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Incentive Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Financial Impact of Stock-Based Compensation Expense Charges

The stock-based compensation expense charges from previously issued equity grants and the financial impact such grants have on the Company’s operating results are reflected in the table below (in thousands, except for per share data):

	Three Months Ended    September 30,				Nine Months Ended   September 30,
	2013		2012		2013		2012
Income before taxes	$	3,185	$	3,729	$	9,629	$	8,164
Net income	$	2,066	$	2,278	$	6,164	$	5,045
Earnings per common share:
Basic earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14
Diluted earnings per common share	$	0.06	$	0.06	$	0.17	$	0.14

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Financial Impact of Stock-Based Compensation Expense (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Income before taxes	$ 3,185	$ 3,729	$ 9,629	$ 8,164
Net income	$ 2,066	$ 2,278	$ 6,164	$ 5,045
Earnings per share:
Basic earnings per common share	$ 0.06	$ 0.06	$ 0.17	$ 0.14
Diluted earnings per common share	$ 0.06	$ 0.06	$ 0.17	$ 0.14

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Long-Term Debt - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended				0 Months Ended		3 Months Ended				3 Months Ended	0 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended					9 Months Ended
	Sep. 13, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Letter of Credit	May 13, 2013 Senior Notes 8.000 Percent Due 2017	Mar. 28, 2013 Senior Notes 8.000 Percent Due 2017	Mar. 31, 2013 Senior Notes 8.000 Percent Due 2017	Sep. 30, 2013 Senior Notes 8.000 Percent Due 2017	Dec. 31, 2012 Senior Notes 8.000 Percent Due 2017	Mar. 14, 2013 Senior Notes 8.000 Percent Due 2017 Tender Offers	Jun. 30, 2013 Senior Notes 8.000 Percent Due 2017 Deferred Loss on Early Extinguishment of Debt	Mar. 14, 2013 Senior Notes 5.000 Percent Due 2021	Sep. 30, 2013 Senior Notes 5.000 Percent Due 2021	Dec. 31, 2012 Senior Notes 5.000 Percent Due 2021	Sep. 13, 2013 Convertible 1.625 Percent Senior Notes Due 2026	Sep. 30, 2013 Convertible 1.625 Percent Senior Notes Due 2026		Dec. 31, 2012 Convertible 1.625 Percent Senior Notes Due 2026		Sep. 30, 2013 Undrawn senior secured revolving credit facility	Sep. 30, 2013 Amended and Restated Credit Agreement One Month LIBOR	Sep. 30, 2013 Amended and Restated Credit Agreement Federal Funds Effective Rate	Sep. 30, 2013 Amended Line of Credit Facility Minimum [Member]	Sep. 30, 2013 Amended Line of Credit Facility Maximum [Member]
Debt Instrument [Line Items]
Senior notes, cash tender offer commenced											$ 0	$ 245,229,000	$ 250,000,000			$ 450,000,000	$ 0		$ 248,861,000	[1]	$ 238,907,000	[1]
Percentage of original principal amount of senior notes outstanding								6.00%	94.00%
Senior notes, redemption price as a percentage of par								106.20%	107.12%									100.00%
Loss on early extinguishment of debt		0	0	(25,776,000)	(6,048,000)					(24,300,000)				(1,500,000)
Debt instrument, principal amount		1,375,000,000		1,375,000,000											450,000,000				250,000,000	[1]
Net proceeds from issuance of senior notes				450,000,000	375,000,000										442,400,000
Repayment of senior notes				250,000,000	300,000,000			16,600,000	252,700,000
Semi-Annual Cash Interest Payment																11,300,000			2,000,000	[1]
Debt instrument, maturity date																Mar. 01, 2021
Debt instrument, effective interest rate																5.21%
Conversion ratio, number of shares issued per stated amount of debt																		20.6260
Conversion ratio, amount of debt retired in exchange for shares																		1,000
Redemption, price in excess of volume-weighted average price, VWAP (Lower Bound)																		$ 48.48
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		4,500,000		4,500,000
Redemption, price in excess of volume-weighted average price, VWAP (Upper Bound)	$ 62.59
Revolving credit facility, current borrowing capacity																							300,000,000.0
Revolving credit facility, maximum borrowing capacity																							500,000,000.0
Debt instrument, margin rate																								1.00%	0.50%
Line of credit facility, commitment fee percentage																										0.375%	0.50%
Letter of credit							900,000.0
Debt, carrying value		1,310,684,000		1,310,684,000		1,089,437,000
Debt, fair value		1,493,200,000		1,493,200,000
Capitalized interest, approximate amount		$ 8,800,000	$ 2,900,000	$ 22,200,000	$ 6,400,000

[1] The 2026 convertible senior notes initially bear interest at a fixed rate of 1.625% per year, declining to 1.375% beginning on November 15, 2013. However, a portion of the proceeds from the Company’s 2019 convertible senior notes issued in August 2012 are expected to be used to retire all of the outstanding 2026 convertible senior notes in November 2013.

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document Document And Entity Information [Abstract]
Entity Registrant Name	HORNBECK OFFSHORE SERVICES INC /LA
Entity Central Index Key	0001131227
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	HOS
Amendment Flag	false
Entity Common Stock, Shares Outstanding		36,052,317

XML

Incentive Compensation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based incentive compensation plan, maximum number of shares covered	4,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	569,472
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards depending on the performance goals	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards depending on the performance goals	100.00%
Time Based Restricted Stock and Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards granted in period	201,745
Cash Settled Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards granted in period	21,490
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period (in years)	3 years
Time Based Restricted Stock | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period (in years)	3 years