10-Q



	UNITED STATES
	SECURITIES AND EXCHANGE COMMISSION
	WASHINGTON, DC 20549



(Mark One)		Form 10-Q



þ	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended March 31, 2016
	or
¨	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 1-13167

ATWOOD OCEANICS, INC.

(Exact Name of Registrant as Specified in Its Charter)



Texas		74-1611874
(State or Other Jurisdiction of Incorporation or Organization)		(IRS Employer Identification No.)

15011 Katy Freeway, Suite 800, Houston, Texas		77094
(Address of Principal Executive Offices including Zip Code)		(Zip Code)

Registrant’s Telephone Number, Including Area Code: (281) 749-7800



	N/A
	(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)

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. Yes þ No o

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). Yes þ No o

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 filer þ	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

As of May 3, 2016, there were 64,797,106 shares of common stock, $1.00 par value per share, outstanding.

ATWOOD OCEANICS, INC.

FORM 10-Q

FOR THE QUARTER ENDED MARCH 31, 2016

TABLE OF CONTENTS



Part I. Financial Information
Item 1.	Unaudited Condensed Consolidated Financial Statements	Page
a)	Unaudited Condensed Consolidated Statements of Operations for the Three and Six Months ended March 31, 2016 and 2015	3
b)	Unaudited Condensed Consolidated Statements of Comprehensive Income for the Three and Six Months ended March 31, 2016 and 2015	4
c)	Unaudited Condensed Consolidated Balance Sheets as of March 31, 2016 and September 30, 2015	5
d)	Unaudited Condensed Consolidated Statement of Changes in Shareholders' Equity for the Six Months Ended March 31, 2016	6
e)	Unaudited Condensed Consolidated Statements of Cash Flows for the Six Months Ended March 31, 2016 and 2015	7
f)	Notes to Unaudited Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	25
Item 4.	Controls and Procedures	25

Part II. Other Information
Item 1.	Legal Proceedings	27
Item 1A.	Risk Factors	27
Item 6.	Exhibits	27
Signatures		28

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)



	Three Months Ended March 31,						Six Months Ended March 31,
(In thousands, except per share amounts)	2016			2015			2016			2015
REVENUES:
Contract drilling	$	282,546		$	338,621		$	577,161		$	675,382
Revenues related to reimbursable expenses	13,805			11,766			27,009			26,731
Total revenues	296,351			350,387			604,170			702,113

COSTS AND EXPENSES:
Contract drilling	89,918			131,124			220,570			267,589
Reimbursable expenses	9,123			8,661			17,409			20,568
Depreciation	41,053			42,528			83,880			87,103
General and administrative	11,488			14,737			26,665			32,146
Asset impairment	708			—			65,432			60,777
Loss on sale of assets	77			5,529			77			15,335
Other, net	(1,137		)	—			(1,060		)	—
	151,230			202,579			412,973			483,518

OPERATING INCOME	145,121			147,808			191,197			218,595

OTHER INCOME (EXPENSE):
Interest expense, net of capitalized interest	(17,098		)	(12,847		)	(30,859		)	(28,351		)
Interest income	6			15			10			72
Gains on extinguishment of debt	8,397			—			8,397			—
Other income	—			—			17,976			—
	(8,695		)	(12,832		)	(4,476		)	(28,279		)

INCOME BEFORE INCOME TAXES	136,426			134,976			186,721			190,316
PROVISION FOR INCOME TAXES	13,989			12,307			25,203			21,429
NET INCOME	$	122,437		$	122,669		$	161,518		$	168,887

EARNINGS PER COMMON SHARE (NOTE 2):
Basic	$	1.89		$	1.90		$	2.49		$	2.62
Diluted	$	1.89		$	1.89		$	2.49		$	2.60
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (NOTE 2):
Basic	64,781			64,620			64,739			64,513
Diluted	64,825			65,048			64,870			65,031

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

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(UNAUDITED)



	Three Months Ended March 31,						Six Months Ended March 31,
(In thousands)	2016			2015			2016			2015
Net income	$	122,437		$	122,669		$	161,518		$	168,887
Other comprehensive income (loss):
Derivative financial instruments:
Unrealized holding gains/(losses)	(4,649		)	1,892			(4,818		)	2,957
Gains/(losses) reclassified to net income	2,043			(227		)	2,738			(267		)
Total other comprehensive income (loss)	(2,606		)	1,665			(2,080		)	2,690

Comprehensive income	$	119,831		$	124,334		$	159,438		$	171,577

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

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS



(In thousands, except par value)	March 31, 2016			September 30, 2015
	(Unaudited)
ASSETS
Cash	$	226,812		$	113,983
Accounts receivable, net	240,740			311,514
Income tax receivable	8,198			8,705
Inventories of materials and supplies, net	110,029			137,998
Prepaid expenses, deferred costs and other current assets	18,790			33,735
Total current assets	604,569			605,935

Property and equipment, net	4,209,558			4,172,132

Other receivables	11,831			11,831
Deferred income taxes	150			150
Deferred costs and other assets	8,884			11,285
Total assets	$	4,834,992		$	4,801,333

LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	$	43,878		$	70,161
Accrued liabilities	19,294			23,572
Dividends payable	—			16,164
Interest payable	8,222			7,704
Income tax payable	20,440			13,906
Deferred credits and other liabilities	3,834			3,941
Total current liabilities	95,668			135,448

Long-term debt	1,595,018			1,678,268
Deferred income taxes	1,096			1,658
Deferred credits	71			800
Other	38,032			37,989
Total long-term liabilities	1,634,217			1,718,715

Commitments and contingencies (Note 8)

Preferred stock, no par value, 1,000 shares authorized, none outstanding	—			—
Common stock, $1.00 par value, 180,000 shares authorized with 64,794 issued and outstanding as of March 31, 2016 and 180,000 shares authorized and 64,654 shares issued and outstanding as of September 30, 2015	64,794			64,654
Paid-in capital	217,037			213,096
Retained earnings	2,826,084			2,670,148
Accumulated other comprehensive income	(2,808		)	(728		)
Total shareholders' equity	3,105,107			2,947,170
Total liabilities and shareholders' equity	$	4,834,992		$	4,801,333

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

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY

(UNAUDITED)



	Common Stock			Paid-in			Retained			Accumulated Other Comprehensive			Total Stockholders’
(In thousands)	Shares	Amount		Capital			Earnings			Income (Loss)			Equity

September 30, 2015	64,654	$	64,654	$	213,096		$	2,670,148		$	(728	)	$	2,947,170

Net income	—	—		—			161,518			—			161,518
Other comprehensive income	—	—		—			—			(2,080		)	(2,080		)
Dividends	—	—		—			(5,582		)	—			(5,582		)
Vesting of restricted stock and performance unit awards	140	140		(1,068		)	—			—			(928		)
Stock compensation expense	—	—		5,009			—			—			5,009
March 31, 2016	64,794	$	64,794	$	217,037		$	2,826,084		$	(2,808	)	$	3,105,107

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

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)



	Six Months Ended March 31,
(In thousands)	2016			2015
Cash flows from operating activities:
Net income	$	161,518		$	168,887
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	83,880			87,103
Amortization	1,607			3,761
Provision for doubtful accounts	1,141			160
Deferred income tax benefit	(650		)	(3,512		)
Share-based compensation expense	5,009			8,119
Asset impairment	65,432			60,777
Loss on sale of assets	77			15,335
(Gain) on extinguishment of debt	(8,397		)	—
Other, net	(1,137		)	—
Changes in assets and liabilities:
Accounts receivable	62,963			15,829
Income tax receivable	507			(3,604		)
Inventories of materials and supplies	16,187			(17,110		)
Prepaid expenses, deferred costs and other current assets	14,709			9,789
Deferred costs and other assets	(1,381		)	(357		)
Accounts payable	(25,306		)	2,825
Accrued liabilities	(3,760		)	(3,691		)
Income tax payable	6,534			(310		)
Deferred credits and other liabilities	1,220			5,747
Net cash provided by operating activities	380,153			349,748

Cash flows from investing activities:
Capital expenditures	(176,175		)	(177,130		)
Proceeds from sale of assets	6,681			2,524
Net cash used in investing activities	(169,494		)	(174,606		)

Cash flows from financing activities:
Proceeds from borrowing of long-term debt	45,000			—
Principal repayments on long-term debt	(120,156		)	(135,000		)
Repayments on short-term debt, net	—			(11,885		)
Dividends paid	(21,746		)	(16,163		)
Proceeds (payments) related to exercise of stock options	(928		)	1,186
Debt issuance costs paid	—			(3,126		)
Net cash used by financing activities	(97,830		)	(164,988		)
Net increase in cash and cash equivalents	112,829			10,154
Cash and cash equivalents, at beginning of period	113,983			80,080
Cash and cash equivalents, at end of period	$	226,812		$	90,234

Non-cash activities:
Increase (decrease) in accounts payable and accrued liabilities related to capital expenditures	$	950		$	3,020

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

ATWOOD OCEANICS, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1—UNAUDITED INTERIM INFORMATION

The accompanying unaudited condensed consolidated financial statements of Atwood Oceanics, Inc. and its subsidiaries as of March 31, 2016 and for the three and six months ended March 31, 2016 and 2015, have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information. Unless otherwise indicated, references to “we”, “us”, “our” and the “Company” refer collectively to Atwood Oceanics, Inc. and subsidiaries. The year-end condensed consolidated balance sheet data was derived from the audited financial statements as of September 30, 2015. Although these financial statements and related information have been prepared without audit and certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, we believe that the note disclosures are adequate to make the information not misleading. The interim financial results may not be indicative of results that could be expected for a full fiscal year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes included in our Annual Report on Form 10-K for the year ended September 30, 2015. In our opinion, the unaudited interim financial statements reflect all adjustments considered necessary for a fair statement of our financial position, results of operations, changes in shareholders' equity, and cash flows for the periods presented. Certain prior period amounts have been reclassified to conform to current year presentation.

Recently issued accounting pronouncements

In March 2016, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (ASU), “Improvements to Employee Share-Based Payment Accounting,” as part of its simplification initiative. The ASU simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities, and classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes.The amendments in this update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): Amendments to the FASB Accounting Standards Codification ("Update 2016-02"), which requires an entity to recognize lease assets and lease liabilities on the balance sheet and to disclose key qualitative and quantitative information about the entity's leasing arrangements. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. A modified retrospective approach is required. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.

In November 2015, amended guidance from the FASB was issued for the balance sheet classification of deferred income taxes. The amended guidance requires the classification of all deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. Deferred tax assets and liabilities will continue to be offset and presented as a single amount under the amended guidance. The effective date for public business entities is for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We have not yet adopted nor selected a transition method and are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.

In April 2015, the FASB issued new guidance intended to simplify the presentation of debt issuance costs. This new guidance requires that debt issuance costs related to outstanding debt be netted against that liability in the balance sheet, consistent with the treatment of debt discounts. In August 2015, the FASB issued additional guidance to clarify that this presentation change does not address debt issuance costs related to line of credit arrangements. The new presentation guidance is effective for fiscal years and interim periods beginning after December 15, 2015 and early adoption is permitted. We adopted this guidance in the first quarter of fiscal 2016. We reclassified $1.7 million from Prepaid Expenses, Deferred Costs and Other Current Assets and $6.0 million from Deferred Costs and Other Assets to Long-Term Debt in the September 30, 2015 Condensed Consolidated Balance Sheet presented in this Form 10-Q to conform to the current year presentation of debt issuance costs.

In May 2014, the FASB issued new guidance intended to change the criteria for recognition of revenue. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.

NOTE 2—EARNINGS PER COMMON SHARE

The computation of basic and diluted earnings per share for the three and six months ended March 31, 2016 and 2015 is as follows:



	Three Months Ended						Six Months Ended
(In thousands, except per share amounts)	Net Income		Shares	Per Share Amount			Net Income		Shares	Per Share Amount
March 31, 2016
Basic earnings per share	$	122,437	64,781	$	1.89		$	161,518	64,739	$	2.49
Effect of dilutive securities:
Stock options	—		—	—			—		—	—
Restricted stock and performance units	—		44	—			—		131	—
Diluted earnings per share	$	122,437	64,825	$	1.89		$	161,518	64,870	$	2.49
March 31, 2015
Basic earnings per share	$	122,669	64,620	1.90			168,887		64,513	$	2.62
Effect of dilutive securities:
Stock options	—		64	—			—		80	—
Restricted stock and performance units	—		364	(0.01		)	—		438	(0.02		)
Diluted earnings per share	$	122,669	65,048	$	1.89		$	168,887	65,031	$	2.60

For the purpose of calculating diluted earnings per share for the three and six months ended March 31, 2016, there were approximately 2,090,399 and 2,085,649 anti-dilutive securities and for the three and six months ended March 31, 2015, there were approximately 1,127,000 and 864,000 anti-dilutive securities.

NOTE 3—PROPERTY AND EQUIPMENT

A summary of property and equipment by classification is as follows:



(In thousands)	March 31, 2016			September 30, 2015
Drilling vessels and equipment	$	3,944,409		$	4,003,483
Construction work in progress	818,580			720,852
Drill pipe	55,768			55,248
Office equipment and other	39,221			36,379
Total cost	4,857,978			4,815,962
Less: Accumulated depreciation	(648,420		)	(643,830		)
Property and equipment, net	$	4,209,558		$	4,172,132

Impairments

The Atwood Falcon completed the contract it was working under in early March 2016. Based on the lack of contracting opportunities and the further deterioration of commodity prices, we determined that it was not likely that additional work would be obtained in the foreseeable future. Based on our analysis, we concluded that the Atwood Falcon and its materials and supplies were impaired as of December 31, 2015, and we wrote them down to their approximate salvage value. We recorded a non-cash impairment charge of approximately $64.7 million ($64.7 million, net of tax, or $1.00 per diluted share), which is included in Asset Impairment on the Condensed Consolidated Statement of Operations for the three months ended December 31, 2015. This impairment charge includes a write-down of property and equipment of $53.0 million and a write-down of our inventory of materials and supplies specific to the Atwood Falcon of $11.7 million.

Following contract completion and mobilization of the vessel to international waters, on March 24, 2016, we executed a sale and recycling agreement with respect to the Atwood Falcon, pursuant to which the vessel, together with associated equipment and

machinery will be sold to a third party to be demolished and recycled. As of March 31, 2016, the Atwood Falcon was classified as Held-for-Sale, and the value of the vessel was adjusted to the lower of its carrying amount or fair value less costs to sell. As a result, we recorded an additional non-cash impairment charge of approximately $0.7 million, which is included in Asset Impairment on the Condensed Consolidated Statement of Operations for the three months ended March 31, 2016 (see Note 9), and its value of $1.3 million is included in Prepaid expenses, deferred costs and other current assets on the Condensed Consolidated Balance Sheet as of March 31, 2016.

The total non-cash impairment charges recorded for the Atwood Falcon of approximately $65.4 million is included in Asset Impairment on the Condensed Consolidated Statement of Operations for the six months ended March 31, 2016.

The Atwood Hunter completed the contract it was working under in December 2014. Based on the lack of contracting opportunities and the further deterioration of commodity prices, in January 2015, we determined that it was not likely that additional work would be obtained in the foreseeable future. Based on our analysis, in the three months ended December 31, 2014, we determined that the Atwood Hunter and its materials and supplies were impaired, and we wrote them down to their salvage value. We recorded a non-cash impairment charge of approximately $60.8 million ($56.1 million, net of tax, or $0.86 per diluted share), which is included in Asset Impairment on the Condensed Consolidated Statement of Operations for the three months ended December 31, 2014. This impairment charge included write-downs of property and equipment of $48.0 million and write-downs of our inventory of materials and supplies that was specific to the Atwood Hunter of $8.4 million. In August 2015, we completed the sale of the Atwood Hunter.

Other Income—During the three months ended December 31, 2015, we recognized approximately $18.0 million ($18.0 million, net of tax, or $0.28 per diluted share) of expected insurance recoveries related to cyclone damage to the Atwood Osprey. This amount is included in Other Income on the Condensed Consolidated Statement of Operations for the six months ended March 31, 2016.

Loss on sale of assets— Our loss on sale of assets for the six months ended March 31, 2016 was primarily due to a loss of approximately $8.0 million ($7.1 million, net of tax, or $0.11 per diluted share) due to the sale of the Atwood Southern Cross and a loss of approximately $5.5 million ($5.5 million, net of tax, or $0.08 per diluted share), due to the sale of Atwood Hunter.

Construction Projects

On December 17, 2015, we entered into a supplemental agreement (collectively, "Supplemental Agreement No. 4") to the construction contracts with Daewoo Shipbuilding and Marine Engineering Co., Ltd ("DSME") which delay our requirements to take delivery of the Atwood Admiral to September 30, 2017 and the Atwood Archer to June 30, 2018. Supplemental Agreement No. 4 amends all material terms of the previous agreements. In consideration of the agreement, we made a payment of $50 million for each drillship on December 31, 2015. DSME has extended all remaining milestone payments, $93.9 million for the Atwood Admiral and $305.9 million for the Atwood Archer, until their respective delivery dates. We retain the option to take earlier delivery of each vessel, subject to a forty-five-day notice period to DSME.

NOTE 4—DEBT

A summary of long-term debt is as follows:



(In thousands)	March 31, 2016		September 30, 2015
6.5% Senior Notes due 2020 ("Senior Notes")	$	635,018	$	648,268
Revolving Credit Facility	960,000		1,030,000
Total long-term debt	$	1,595,018	$	1,678,268

Senior Notes

As of March 31, 2016, $636.5 million aggregate principal amount of our Senior Notes were outstanding. Our Senior Notes are presented in the table above net of the unamortized premium from their issuance and net of unamortized debt issuance costs of $6.7 million and $7.7 million as of March 31, 2016 and September 30, 2015, respectively. Our Senior Notes are unsecured obligations and are not guaranteed by any of our subsidiaries.

During the three months ended March 31, 2016, we repurchased, through open market transactions, $13.5 million aggregate principal of our Senior Notes at an aggregate cost of $5.1 million, including a minimal amount of accrued interest, representing an average discount of 62.2%. As a result of the repurchases, we recognized a total gain on debt retirement, net of the related debt issuance costs of $8.4 million ($8.4 million, net of tax, or $0.13 per diluted share) in Gains on extinguishment of debt on the Condensed Consolidated Statement of Operations for the three and six months ended March 31, 2016. The repurchases were made using available cash balances (see Note 9).

Revolving Credit Facility

On March 25, 2016, we entered into an amendment to our senior secured revolving credit facility (the "Credit Facility") providing that, among other things, effective on March 28, 2016, (i) removes the maximum leverage ratio and maximum secured leverage ratio financial covenants, (ii) amends the minimum interest expense coverage ratio such that it is not applicable until the quarter ending September 30, 2018, and decreases the minimum ratio required to 1.15:1.00, (iii) adds a minimum liquidity financial covenant of $150 million, (iv) revises the restricted payments covenant to prohibit us from paying dividends, (v) reduces the total commitments under the Credit Facility by $152 million, and (vi) permits the incurrence of up to $400 million of second lien debt, subject to the parameters set forth therein. After giving effect to the amendment, commitments under the Credit Facility are $1.395 billion through May 2018 and $1.1205 billion through May 2019. As a result of the amendment, borrowings under the Credit Facility will bear interest at the Eurodollar rate plus a margin ranging from 2.50% to 3.25% and the commitment fee on the unused portion of the underlying commitment ranges from 1.00% to 1.30% per annum, in each case based on our corporate credit ratings.

In connection with the amendment, we mortgaged the Atwood Achiever, the Atwood Advantage and the Atwood Orca, as additional collateral under the Credit Facility, as well as pledged the equity interests in our subsidiaries that own, directly or indirectly, these three vessels. Additionally, the Atwood Eagle and Atwood Falcon, along with the pledged equity interests in certain of our subsidiaries that, directly or indirectly, own these two vessels, were removed as collateral under the Credit Facility. Our interest in the two drillships under construction remain unencumbered by the Credit Facility.

As of March 31, 2016, our Credit Facility had $1.395 billion of total commitments and we had $960 million of outstanding borrowings. As of March 31, 2016, we had approximately $435 million available for borrowings under the Credit Facility. Approximately $275 million of the commitments mature in May 2018 and approximately $1.12 billion of the commitments under the Credit Facility mature in May 2019.

Obligations under the Credit Facility are secured primarily by first preferred mortgages on nine of our drilling units (Atwood Aurora, Atwood Beacon, Atwood Condor, Atwood Mako, Atwood Manta, Atwood Osprey, Atwood Achiever, Atwood Advantage and Atwood Orca), as well as liens on the equity interests of our subsidiaries that own, directly or indirectly, such drilling units. We were in compliance with all financial covenants under the Credit Facility as of March 31, 2016 and we anticipate that we will continue to be in compliance for the next 12 months.

The weighted-average effective interest rate on our long-term debt was approximately 4.30% per annum as of March 31, 2016. The effective rate was determined after giving consideration to the effect of our interest rate swaps accounted for as hedges and the amortization of debt issuance costs and our debt premiums. Interest capitalized for the three and six months ended March 31, 2016 was approximately $3.8 million and $8.4 million respectively. Interest capitalized for the three and six months ended March 31, 2015 was approximately $4 million and $9 million respectively.

NOTE 5—FAIR VALUE OF FINANCIAL INSTRUMENTS

We have certain assets and liabilities that are required to be measured and disclosed at fair value. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value into three levels. Priority is given to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, takes into account the market for our financial assets and liabilities, the associated credit risk and other considerations.

We have classified and disclosed fair value measurements using the following levels of the fair value hierarchy:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3: Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).

Fair value of Certain Assets and Liabilities

The fair value of cash, accounts receivable and accounts payable approximate fair value because of their short term maturities.

Fair Value of Financial Instruments

Independent third party services are used to determine the fair value of our financial instruments using quoted market prices and observable inputs. When independent third party services are used, we obtain an understanding of how the fair values are derived and selectively corroborate fair values by reviewing other readily available market based sources of information.

Senior Notes – The carrying value of our Senior Notes, net of unamortized premium and debt issuance costs, is $635 million ($636.5 million principal amount) while the fair value of our Senior Notes was $316 million as of March 31, 2016. The fair value is determined by a market approach using quoted period-end bond prices. We have classified this as a Level 2 fair value measurement as valuation inputs for fair value measurements are quoted market prices as of March 31, 2016 that can only be obtained from independent third party sources. The fair value amount has been calculated using these quoted prices. However, no assurance can be given that the fair value would be the amount realized in an active market exchange.

Credit Facility - Our Credit Facility is variable-rate and the carrying value of our variable-rate debt approximates fair value because such debt bears short-term, market-based interest rates. We have classified the fair value measurement of this instrument as Level 2 as valuation inputs for purposes of determining our fair value disclosure are readily available published Eurodollar rates.

Derivative financial instruments - Our derivative financial instruments consist of our interest rate swap contracts and our foreign currency forward exchange contracts. We record our derivative contracts at fair value on our consolidated balance sheets. The fair values of our interest rate swaps and our foreign currency forward exchange contracts are based upon valuations calculated by an independent third party. The derivatives were valued according to the "market approach" where possible, and the "income approach" otherwise. A third party independently valued each instrument using forward price data obtained from reputable data providers (e.g., Bloomberg and Reuters) and reviewed market activity and similarity of pricing terms to determine appropriate reliability level assertions for each instrument. The contribution of the credit valuation adjustment to total fair value is less than 1% for all derivatives and is therefore not significant. Based on valuation inputs for fair value measurement and independent review performed by third party consultants, we have classified our derivative contracts as Level 2 as they were valued based upon observable inputs from dealer markets.

The following table sets forth the estimated fair value of our derivative financial instruments as of March 31, 2016 and September 30, 2015, which are measured and recorded at fair value on a recurring basis:



		March 31,			September 30,
(In thousands)	Balance Sheet Classification	2016			2015
Derivative assets designated as hedges:
Short-term foreign currency forwards	Prepaid expenses, deferred costs and other current assets	$	—		$	3,822
Derivative liabilities designated as hedges:
Short-term interest rate swaps	Accrued liabilities	(1,570		)	(1,326		)
Short-term foreign currency forwards	Deferred credits and other liabilities	(193		)	—
Long-term interest rate swaps	Other long-term liabilities	(1,090		)	(974		)
Total derivative contracts, net		$	(2,853	)	$	1,522

NOTE 6—SHARE-BASED COMPENSATION

A summary of our share-based compensation expense during the six months ended March 31, 2016 and 2015 is as follows:



	Six Months Ended March 31,
(In thousands, except average service periods)	2016		2015
Share-based compensation recognized	$	5,009	$	8,119
Unrecognized compensation cost, net of estimated forfeitures	21,469		26,310
Remaining weighted-average service period (years)	2.1		2.0

Restricted Stock Units

During the six months ended March 31, 2016, we granted to certain employees and our non-employee directors, restricted stock units that are subject to vesting conditions. The grant date fair value of these awards was based on the fair value of our common stock on the date of grant. A summary of our restricted stock activity for the six months ended March 31, 2016 is as follows:



	Number of Shares (000s)		Weighted Average Fair Value
Unvested as of October 1, 2015	711		$	43.14
Granted	642		14.32
Vested	(190	)	44.96
Forfeited	(76	)	32.10
Unvested as of March 31, 2016	1,087		26.15

Performance Units

During the six months ended March 31, 2016, we granted to certain employees share-based awards that are subject to market-based performance conditions ("Performance Units"). The grant date fair value of these performance units was determined through use of the Monte Carlo simulation method. A summary of Performance Units stock activity for the six months ended March 31, 2016 is as follows:



	Number of Shares (000s)	Weighted Average Fair Value
Unvested as of October 1, 2015	240	$	43.73
Granted	254	15.63
Vested	—	—
Forfeited	—	—
Unvested as of March 31, 2016	494	26.69

Stock Options

A summary of stock option activity for the six months ended March 31, 2016 is as follows:



	Number of Options (000s)		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (000s)
Outstanding as of October 1, 2015	685		$	34.90
Granted	—		—
Exercised	—		—			—
Forfeited	—		—
Expired	(17	)	27.25
Outstanding as of March 31, 2016	668		35.10		3.8	(17,325	)
Exercisable as of March 31, 2016	668		35.10		3.8	(17,325	)

NOTE 7— INCOME TAXES

Our consolidated effective income tax rate for the three and six months ended March 31, 2016 was approximately 10% and 13%, as compared to 9% and 11% for the three and six months ended March 31, 2015. The effective tax rate for the three and six months ended March 31, 2016 was higher than the rate for the three and six months ended March 31, 2015, primarily due to a change in the geographical mix of income compared to prior periods. Our effective tax rate was lower than the U.S. statutory rate of 35% as a result of working in certain lower tax jurisdictions outside the United States. We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense. As of March 31, 2016, we had approximately $16.0 million of reserves for uncertain tax positions, including estimated accrued interest and penalties of $3.9 million, which are included in Other long-term liabilities in the Consolidated Balance Sheet. None of our reserves for uncertain tax positions relate to timing differences. All of the net uncertain tax liabilities would affect the effective tax rate if realized.

NOTE 8—COMMITMENTS AND CONTINGENCIES

Litigation

We are party to a number of lawsuits which are ordinary, routine litigation incidental to our business, the outcome of which is not expected to have, either individually or in the aggregate, a material adverse effect on our financial position, results of operations or cash flows.

Other Matters

The Atwood Beacon operated in India from early December 2006 to the end of July 2009. A service tax was enacted in India in 2004 on revenues derived from seismic and exploration activities. This service tax law was subsequently amended in June 2007 and again in May 2008 to state that revenues derived from mining services and drilling services were specifically subject to this service tax. The contract terms with our customer in India provided that any liability incurred by us related to any tax obligation pursuant to laws not in effect at the time the contract was executed in 2005 was to be reimbursed by our customer. We believe any service taxes assessed by the Indian tax authorities under the 2007 or 2008 amendments are an obligation of our customer. Our customer is disputing this obligation on the basis of its contention that revenues derived from drilling services were taxable under the initial 2004 law, and are, therefore, our obligation.

After reviewing the status of the drilling services we provided to our customer, the Indian tax authorities assessed service tax obligations on revenues derived from the Atwood Beacon commencing on June 1, 2007. The relevant Indian tax authority issued an extensive written ruling setting forth the application of the June 1, 2007 service tax regulation and confirming the position that drilling services, including the services performed under our contract with our customer prior to June 1, 2007, were not covered by the 2004 service tax law. In August 2012, the Indian Custom Excise and Service Tax Appellate Tribunal issued an Order in our favor confirming our position that service tax did not apply to drilling services performed prior to June 1, 2007. The Indian Service Tax Authority has appealed this ruling to the Indian Supreme Court.

As of March 31, 2016, we had paid to the Indian government $10.5 million in service taxes and have accrued $1.3 million of additional service tax obligations in accrued liabilities on our consolidated balance sheets, for a total of $11.8 million relating to service taxes. We recorded a corresponding $11.8 million long-term other receivable due from our customer relating to service taxes due under the contract. We continue to pursue collection of such amounts from our customer and expect to collect the amount recorded.

NOTE 9—SUBSEQUENT EVENTS

On April 13, 2016, the Atwood Falcon sale and recycling transaction closed and title of the vessel and associated equipment and machinery transferred to a third party buyer (see Note 3).

In April 2016, we completed additional repurchases of $140.7 million aggregate principal amount of our Senior Notes for $94.0 million, including $2.3 million of accrued interest, representing an average discount of 34.8%. These repurchases, both in the period ended March 31, 2016 and in April 2016, allowed us to reduce our outstanding indebtedness and related interest expense at a significant discount to the face value of our Senior Notes. The repurchases were made using available cash balances. Following these repurchases, the Company has $495.8 million Senior Notes outstanding.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the accompanying unaudited condensed consolidated financial statements as of March 31, 2016 and for the three and six months ended March 31, 2016 and 2015 included in this report and with our Annual Report on Form 10-K for the fiscal year ended September 30, 2015. The following discussion and analysis contains forward-looking statements that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors, including those set forth under “Risk Factors” in Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2015 and elsewhere in this report. See “Forward-Looking Statements” below.

OVERVIEW

The following discussion is intended to assist in understanding our financial position as of March 31, 2016, and our results of operations for the three and six months ended March 31, 2016 and March 31, 2015. Financial and operating results for the three and six months ended March 31, 2016, include:


•	Operating revenues totaling $296.4 million and $604.2 million on 778 and 1,570 operating days for the three and six months ended March 31, 2016, respectively, as compared to operating revenues of $350.4 million and $702.1 million on 989 and 2,012 operating days for the three and six months ended March 31, 2015, respectively;


•	Net income of $122.4 million and $161.5 million for the three and six months ended March 31, 2016, respectively, as compared to net income of $122.7 million and $168.9 million for the three and six months ended March 31, 2015, respectively;


•	Capital expenditures of $176.2 million for the six months ended March 31, 2016, as compared to capital expenditures of $177.1 million for the six months ended March 31, 2015; and


•	Increase in cash on hand of $112.8 million for the six months period ended March 31, 2016 to $226.8 million.

MARKET OUTLOOK

Industry Conditions

The level of activity in the offshore drilling industry, which affects the sector's profitability, is cyclical and highly dependent on the offshore capital expenditure levels of exploration and production ("E&P") companies. In turn, E&P company offshore drilling expenditures are influenced by the current prices of oil and gas, expectations about future prices, company-specific cash flow levels, historical project returns and other capital allocation strategies (e.g., onshore versus offshore drilling).

The offshore drilling industry has experienced declining demand for drilling rigs since the second half of calendar year 2014 due to a significant slowdown in E&P spending offshore that has been exacerbated by a sharp decline in oil prices. E&P companies generally reduced their offshore capital spending in 2015 and they are doing so again in calendar year 2016 by canceling or deferring planned drilling programs in accordance with lower budgets for offshore expenditures. Since declining to multi-year lows below $30 per barrel in January, oil prices have recovered to approximately $45 per barrel in April. However, absent a further increase in oil prices, we expect offshore rig demand to decline into the second half of calendar year 2016 as offshore rigs complete existing contracts at a faster rate than new drilling programs are initiated. Declines in offshore drilling demand and the associated reductions in rig utilization and day rates, could materially and adversely affect our financial position, results of operation or cash flows. See "Our business depends on the level of activity in the oil and natural gas industry, which is significantly impacted by the volatility in oil and natural gas prices" under "Risk Factors" Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2015.

As rig demand has declined over the past eighteen months, the supply of offshore drilling rigs, both floaters and jackups, has grown as drilling contractors have taken delivery of newer, more capable rigs which were ordered earlier in the cycle. More recently, drilling contractors have delayed further rig deliveries through renegotiation of terms with the shipyards that are constructing these rigs. Due to the confluence of an oversupply of offshore rigs and declining rig demand, a lower percentage of marketed rigs are being re-contracted, and day rates and utilization have declined sharply across all offshore rig classes. Customers continue to prefer newer, high specification rigs over older, less capable rigs, especially for drilling programs with a high degree of technical complexity or which are conducted in more remote geological basins. However, the general bifurcation of utilization and day rates across different generations of rigs has not prevented many newer, modern rigs from being idled or cold-stacked as drilling demand has declined across all regions, water depths and rig classes.

Due to the uncertain duration of the current industry downturn, a growing number of older, less capable rigs have been scrapped or announced for scrapping since 2014, and this trend has accelerated thus far in calendar year 2016. However, even with the removal of approximately fifty floaters and twenty jackups from the supply stack since 2014, further declines in rig utilization and day rates are possible due to the persistence of an offshore rig supply and demand imbalance.

Consistent with our policy, we evaluate our drilling rigs and related equipment for impairment whenever events or changes in circumstances indicate the carrying value of these assets may exceed the estimated future net cash flows. Our evaluation, among other things, includes a review of external market factors and an assessment on the future marketability of a specific drilling unit. Further declines in offshore drilling demand, and/or a lack of improvement in drilling activity or market day rates, may result in potential impairments to our drilling rigs and related equipment in the future. See "We may be required to record impairment charges with respect to our rigs" under "Risk Factors" Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2015.

A recent trend of some E&P companies to cancel, renegotiate, or repudiate existing drilling contracts has continued into 2016 as rig demand and market day rates decline further. In fiscal year 2015, we renegotiated drilling contracts with respect to the Atwood Osprey, Atwood Beacon, Atwood Achiever and the Atwood Orca. Following a weather-related force majeure event, we entered into an amendment to the Atwood Osprey drilling contract in April 2015 that reduced the contractual maturity date by one year. In addition, we reached agreements for a six-month extension for the Atwood Beacon in July 2015, a one year extension for the Atwood Achiever in October 2015, a nine month extension for the Atwood Orca in October 2015 and a four month extension for the Atwood Advantage in November 2015. These four agreements incorporated reduced day rates for some portion of the existing term in exchange for the extensions. In March 2016, we negotiated with a customer to shift remaining contract backlog from the Atwood Eagle to the Atwood Osprey in order to preserve the continuity of operations for the Atwood Osprey. This shift in backlog did not alter the contractual day rate for the customer, but it did lead to the immediate idling of the Atwood Eagle.

Some of our contracts with customers may be canceled at the option of the customer upon payment of a termination fee which may not fully compensate us for the loss of the contract and may result in a rig being idled for an extended period of time. In addition, some of our customers could experience liquidity or solvency issues or could otherwise be unable or unwilling to perform under a contract, which could ultimately lead a customer to enter bankruptcy or otherwise encourage a customer to seek to repudiate, cancel or renegotiate a contract. Further deterioration in cash flow generation by E&P companies may accelerate these trends. If our customers seek to cancel or renegotiate our significant contracts and we are unable to negotiate favorable terms or secure new contracts on substantially similar terms, or at all, our revenues and profitability could be materially reduced.

Ultra-deepwater and Deepwater Rig Markets

Both the ultra-deepwater and deepwater rig markets are experiencing declining demand, utilization and day rates. As of April 22, 2016, the number of marketed ultra-deepwater rigs under contract industry-wide decreased to 108 (from 140 on April 22, 2015) representing 74% utilization of a total of 147 active rigs. The number of marketed deepwater rigs under contract decreased to 25 (from 45 on April 22, 2015), representing 58% utilization of a total of 43 active rigs. Declines in the percentage of marketed rigs under contract have been driven by reduced rig demand across all geographic regions coupled with an increase in marketed supply due to deliveries of newbuild rigs, primarily from Korean and Singaporean shipyards.

As of April 22, 2016, 33 ultra-deepwater floaters were under construction with scheduled deliveries through January 2020, 9 of which were contracted. However, this figure includes 5 floaters under long-term contracts with Petrobras, many of which may be delayed, repudiated, or canceled due to the extensive financial difficulties of the primary Brazilian rig-owning entity. In response to reduced rig demand and lack of suitable drilling programs, we and other drilling contractors have proactively delayed delivery of rigs under construction. Thirteen ultra-deepwater rigs are scheduled for delivery during the remainder of calendar year 2016, 12 are scheduled for delivery in 2017 and an additional 8 units are scheduled for delivery in 2018 and beyond.

The number of idle offshore rigs being cold-stacked and scrapped has continued to increase due to the unfavorable market conditions. During calendar year 2015, 16 ultra-deepwater rigs and 16 deepwater rigs, were announced for cold-stacking, retirement or scrapping and are no longer being actively marketed. In 2016 through April 22, the figures are 8 ultra-deepwater rigs and 7 deepwater rigs, reflecting an accelerating rate versus 2015 full-year levels. We expect this trend of marketed supply attrition to continue into the second half of 2016 as limited re-contracting opportunities for floaters completing their drilling programs, leads to a growing supply of idle rigs.

Our Ultra-deepwater Rigs and Deepwater Rigs

The Atwood Achiever, a dynamically positioned, ultra-deepwater drillship, is operating offshore Northwest Africa and is contracted through approximately November 2018. The client has an option to revert the contract to its original end date of November 2017 by making a payment approximately equal to the difference in the original day rate for the time periods for which the current reduced operating day rate was invoiced. The Atwood Advantage, a dynamically positioned, ultra-deepwater drillship, is operating in the U.S. Gulf of Mexico and is contracted through August 2017.

The Atwood Condor, a dynamically positioned, ultra-deepwater semisubmersible, is operating in the U.S. Gulf of Mexico and is contracted through November 2016.

The Atwood Osprey, an ultra-deepwater semisubmersible and the Atwood Eagle deepwater semisubmersibles, were both operating offshore Australia. On March 19, 2016, the Atwood Eagle's drilling services contract with Woodside Energy Ltd was mutually amended to assign and utilize the Atwood Osprey to perform drilling services for the remaining 165 days under contract. The amendment will take effect after the completion of the Atwood Osprey’s current drilling program ending in June 2016. The other material contractual terms and conditions of the drilling contract, including day rate, remain unchanged. The Atwood Eagle will be mobilized to Singapore where the rig will be idled and actively marketed for a new drilling contract.

The Atwood Falcon, a deepwater semisubmersible, was operating offshore Australia and was contracted through March 2016. Following contract completion and mobilization of the vessel to international waters, on March 24, 2016, we executed a sale and recycling agreement with a third party buyer for the purpose of selling the Atwood Falcon. The agreement requires the buyer to demolish and recycle the vessel and associated equipment/machinery.

The Atwood Admiral and Atwood Archer are DP-3 dynamically-positioned, dual derrick, ultra-deepwater drillships rated to operate in water depths up to 12,000 feet and are currently under construction at the DSME shipyard in South Korea. These drillships will have enhanced technical capabilities, including two seven-ram BOPs, three 100-ton knuckle boom cranes, a 165-ton active heave “tree-running” knuckle boom crane and 200 person accommodations. Total cost, including project management, drilling and handling tools and spares, is approximately $635 million per drillship.

The Atwood Admiral and Atwood Archer were originally scheduled to be delivered in March 2015 and December 2015, respectively. Due to lack of suitable drilling programs, we have not yet secured the initial drilling contracts for these rigs. As a result, we have entered into amendments to our construction contracts with DSME to delay the required delivery date of these two rigs to September 30, 2017 and June 30, 2018, respectively. We are unable to provide any assurance that we will obtain drilling contracts for these rigs prior to their delivery. See Note 3 to our Condensed Consolidated Financial Statements in Item 1 of Part I of this Quarterly Report for further details of these amendments.

Jackup Rig Market

The jackup rig market is experiencing similar utilization and day rate challenges as the floating rig market. Declining rig demand coupled with continued delivery of newbuild rigs, primarily from shipyards in China and Singapore, have negatively impacted the jackup rig supply and demand balance worldwide. Despite the bifurcation trend that favors utilization of new, higher specification rigs at the expense of older, lower specification rigs, all classes of jackup rigs have experienced lower day rates and utilization. As of April 22, 2016, the percentage of marketed high specification jackup rigs (i.e., rigs equal to or greater than 350-foot water depth capability) under contract was approximately 70% as compared to 73% for the remainder of the global jackup fleet.

We expect that the continued increase in global jackup supply due to the delivery of high specification newbuild rigs through the end of 2017 will put additional pressure on jackup rig utilization and day rates. As of April 22, 2016, there were 120 newbuild jackup rigs under construction (from 124 on April 22, 2015), most of which are being constructed in China and many of which are owned by speculators or the constructing shipyards. Of the 57 jackup rigs scheduled for delivery in the remainder of 2016, only nine are contracted, while the remaining 63 rigs are scheduled for delivery primarily in 2017 and 2018. Due to lack of sufficient rig demand to absorb this additional supply, some of these scheduled jackup deliveries are expected to be delayed and/or canceled. Absent a strong recovery in high specification jackup rig demand and/or a significant reduction in rig supply due to cold-stacking, scrapping or retirements, the increasing marketed supply of jackups is likely to exceed customer requirements for the foreseeable future.

The number of idle jackup rigs removed from the marketed rig supply increased significantly in calendar year 2015, as 8 high specification jackups and 26 standard jackups were cold-stacked, scrapped or retired. In 2016 through April 22, the figures are 8 high specification jackups and 3 standard jackups reflecting an accelerating rate over 2015 full-year levels. This trend of marketed supply attrition is expected to continue into the second half of 2016 as older rigs are displaced due to declining overall jackup demand and increasing competition from newer, more capable rigs.

Our High Specification Jackup Rigs

The Atwood Mako and Atwood Manta, both 400-foot water depth Pacific Class jackup rigs, operated offshore Vietnam through September 2015 and offshore Thailand through October 2015, respectively. The Atwood Mako and Atwood Manta were idled in October 2015 after they completed their contracts and we were unable to obtain follow-on work. We are continuing to actively market these high-specification jackup rigs while they are currently idle.

The Atwood Aurora, a 350-foot water depth jackup, is operating offshore West Africa and is contracted through September 2016. The Atwood Beacon, a 400-foot water depth jackup, is operating in the Mediterranean Sea and is contracted through June 2016. The Atwood Orca, a 400-foot water depth Pacific Class jackup is operating offshore Thailand and is contracted through October 2016.

Contract Backlog

We maintain a backlog of commitments for contract drilling revenues. Our contract backlog as of March 31, 2016 was approximately $1.0 billion representing a 55% decrease compared to our contract backlog of $2.2 billion as of March 31, 2015 primarily due to realization of contract backlog. We calculate our contract backlog by multiplying the day rate under our drilling contracts by the number of days remaining under the contract, assuming full utilization. The calculation does not include any revenues related to other fees such as for mobilization, demobilization, contract preparation, revenues from billing our customers for reimbursable items or bonuses. The amount of actual revenues earned and the actual periods during which revenues are earned will be different from the amounts disclosed in our backlog calculations due to a lack of predictability of various factors, including newbuild rig delivery dates, unscheduled repairs, maintenance requirements, weather delays and other factors. Such factors may result in lower applicable day rates than the full contractual day rate and/or delays in receiving the full contractual operating rate. In addition, under certain circumstances, our customers may seek to terminate, repudiate or renegotiate our contracts, which could have the effect of reducing our contract backlog. See “Risks Related to our Business-Our business may experience reduced profitability if our customers terminate, repudiate, or renegotiate our drilling contracts” under Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2015.

The following tables set forth the amount of our contract drilling revenue backlog and the percentage of available operating days committed for our fleet, excluding drilling units under construction and the Atwood Falcon which was sold in April 2016, for the periods indicated as of March 31, 2016.



Contract Drilling Revenue Backlog	Remaining Fiscal 2016		Fiscal 2017		Fiscal 2018		Fiscal 2019		Fiscal 2020		Total
(In millions)
Ultra-deepwater	$	379	$	372	$	181	$	21	$	—	$	953
Deepwater	—		—		—		—		—		—
Jackups	56		2		—		—		—		58
Total	$	435	$	374	$	181	$	21	$	—	$	1,011



Percentage of Available Operating Days Committed	Remaining Fiscal 2016		Fiscal 2017		Fiscal 2018		Fiscal 2019		Fiscal 2020
Ultra-deepwater	100	%	53	%	25	%	3	%	—	%
Deepwater	—	%	—	%	—	%	—	%	—	%
Jackups	48	%	2	%	—	%	—	%	—	%
Total	64	%	22	%	10	%	1	%	—	%

RESULTS OF OPERATIONS

Revenues—Revenues for the three and six months ended March 31, 2016 decreased approximately $54 million and $98 million, respectively, or 15% and 14%, respectively, as compared to the three and six months ended March 31, 2015. An analysis of revenues by rig category is as follows:



	REVENUES
		Three Months Ended March 31,							Six Months Ended March 31,
(In millions)		2016		2015		Variance			2016		2015		Variance
Ultra-Deepwater		$	189	$	183	$	6		$	371	$	350	$	21
Deepwater		59		82		(23		)	131		181		(50		)
Jackups		34		73		(39		)	75		145		(70		)
Reimbursable		14		12		2			27		26		1
		$	296	$	350	$	(54	)	$	604	$	702	$	(98	)

Our ultra-deepwater fleet realized average revenues of $520,000 per day on 364 operating days for the three months ended March 31, 2016, as compared to $510,000 per day on 360 operating days for the three months ended March 31, 2015. The ultra-deepwater fleet realized average revenues of $520,000 per day on 712 operating days, as compared to $495,000 per day on 708 operating days for the six months ended March 31, 2016 and 2015, respectively. The increase in revenues for the ultra-deepwater fleet for the three and six months ended March 31, 2016 relates to better efficiency in fiscal year 2016, and unplanned maintenance on the Atwood Achiever and emergency repairs on the Atwood Osprey due to tropical cyclone Olwyn in fiscal year 2015.

Our deepwater fleet realized average revenues of $415,000 per day on 141 operating days for the three months ended March 31, 2016, as compared to $460,000 per day on 180 operating days for three months ended March 31, 2015. The deepwater fleet realized average revenues of $427,000 per day on 307 operating days as compared to $420,000 per day on 429 operating days for the six months ended March 31, 2016 and 2015, respectively. The decrease in operating days and revenue for fiscal year 2016, compared to fiscal year 2015, is primarily due to Atwood Falcon and Atwood Eagle completing their contracts in fiscal year 2016. The Atwood Falcon was idled and subsequently sold for recycling purposes, while the Atwood Eagle’s contract was suspended and remaining term transferred to the Atwood Osprey.

Our jackup fleet realized average revenues of $128,000 per day on 273 operating days for the three months ended March 31, 2016, as compared to $160,000 per day on 449 operating days for three months ended March 31, 2015. The jackup fleet realized average revenues of $136,000 per operating day on 551 operating days, as compared to $165,000 per operating day on 875 operating days for the six months ended March 31, 2016 and 2015, respectively. The jackup fleet realized lower revenue and operating days for the three and six months ended March 31, 2016, as compared to three and six months ended March 31, 2015 primarily due to the Atwood Manta and the Atwood Mako being idled in October 2015.

Revenue related to reimbursable expenses is primarily driven by our clients' requests for equipment, fuel, services and/or personnel that are not included in the contractual operating day rate. Thus, these revenues vary depending on the timing of the clients' requests and the work performed. Additionally, as a result of a certain number of our rigs being idled, reimbursable revenue naturally declines while the rigs remain un-contracted. Changes in the amount of revenue related to reimbursable expenses generally do not have a material effect on our financial position, results of operations, or cash flows.

Drilling Costs—Drilling costs for the three and six months ended March 31, 2016 decreased approximately $41 million and $50 million, respectively, or 29% and 17%, respectively, as compared to the three and six months ended March 31, 2015. An analysis of contract drilling costs by rig category is as follows:



	DRILLING COSTS
	Three Months Ended March 31,								Six Months Ended March 31,
(In millions)	2016			2015		Variance			2016			2015		Variance
Ultra-Deepwater	$	54		$	68	(14		)	115			131		(16		)
Deepwater	19			32		(13		)	62			73		(11		)
Jackups	19			30		(11		)	45			61		(16		)
Reimbursable	9			9		—			17			21		(4		)
Other	(2		)	1		(3		)	(1		)	2		(3		)
	$	99		$	140	$	(41	)	$	238		$	288	$	(50	)

Ultra-deepwater drilling costs decreased for the three and six months ended March 31, 2016, as compared to the three and six months ended March 31, 2015. Average drilling costs per calendar day for our ultra-deepwater rigs decreased from approximately $189,000 for the three months March 31, 2015, to approximately $148,000 for the three months ended March 31, 2016, and from $180,000 for the six months ended March 31, 2015, to $157,000 for the six months ended March 31, 2016. The drilling costs for our ultra-deepwater rigs were lower in 2016 due to cost saving initiatives executed on payroll, and lower repairs and maintenances costs. Additionally, repair costs in fiscal year 2015 were higher due to the unplanned repair costs incurred on the Atwood Osprey as a result of damages from tropical cyclone Olwyn.

Deepwater drilling costs decreased for the three and six months ended March 31, 2016, as compared to the three and six months ended March 31, 2015. Average drilling costs per calendar day for our deepwater rigs decreased from approximately $180,000 for the three months ended March 31, 2015, to approximately $103,000 for three months ended March 31, 2016, and $160,000 for the six months ended March 31, 2015, to $169,000 for the six months ended March 31, 2016. This decrease is primarily due to the contract completion of the Atwood Falcon and Atwood Eagle, resulting in lower costs in fiscal year 2016.

Jackup drilling costs decreased for the three and six months ended March 31, 2016, as compared to the three and six months ended March 31, 2015, primarily due to the Atwood Mako and Atwood Manta being idled in October 2015. The average drilling cost per calendar day decreased from approximately $65,000 for the three months ended March 31, 2015, to approximately $41,000 for the three months ended March 31, 2016, and $133,000 for the six months ended March 31, 2015, to $50,000 for the six months ended March 31, 2016.

Reimbursable costs are primarily driven by our clients' requests for equipment, fuel, services and/or personnel that are not typically included in the contractual operating day rate. Thus, these costs vary depending on the timing of the clients' requests and the work performed. Additionally, as a result of a certain number of our rigs being idled, reimbursable costs naturally declines while the rigs remain un-contracted. Changes in the amount of reimbursable costs generally do not have a material effect on our financial position, results of operations or cash flows.

Depreciation—Depreciation expense for the three and six months ended March 31, 2016 decreased approximately $2 million and $3 million, respectively, or 5% and 3%, respectively, as compared to the three and six months ended March 31, 2015. This decrease is primarily due to the impairment of the Atwood Hunter as a result of it being idled in December 2014 and the Atwood Falcon, which was impaired in December 2015. An analysis of depreciation expense by rig category is as follows:



	DEPRECIATION EXPENSE
	Three Months Ended March 31,							Six Months Ended March 31,
(In millions)	2016		2015		Variance			2016		2015		Variance
Ultra-Deepwater	$	29	$	28	$	1		$	58	$	56	$	2
Deepwater	2		3		(1		)	5		10		(5		)
Jackups	9		9		—			18		18		—
Other	1		3		(2		)	3		3		—
	$	41	$	43	$	(2	)	$	84	$	87	$	(3	)

Deepwater depreciation decreased $1 million and $5 million for the three and six months ended March 31, 2016, as compared to the three and six months ended March 31, 2015, respectively, due to the impairment of the Atwood Hunter in December 2014, and the impairment of the Atwood Falcon in December 2015.

Asset Impairment— During the six months ended March 31, 2016, we recorded a non-cash impairment charge of approximately $65.4 million ($65.4 million, net of tax, or $1.00 per diluted share) to write the Atwood Falcon and its inventory of materials and supplies down to their approximate salvage value. See Note 3 to Condensed Consolidated Financial Statements in Item 1 of Part I of this Quarterly Report.

During the six months ended March 31, 2015, we recorded a non-cash impairment charge of approximately $60.8 million ($56.1 million, net of tax, or $0.86 per diluted share) to write the Atwood Hunter and its inventory of materials and supplies down to their salvage value. See Note 3 to Condensed Consolidated Financial Statements in Item 1 of Part I of this Quarterly Report.

General and Administrative— For the six months ended March 31, 2016, general and administrative expenses decreased by approximately $5.4 million to $26.7 million, as compared to $32.1 million for the six months ended March 31, 2015. These decreases were primarily due to reductions in payroll and related costs associated with several company-wide cost saving measures.

Loss on sale of assets— Our loss on sale of assets for the six months ended March 31, 2015 was primarily due to a loss of approximately $8.0 million ($7.1 million, net of tax, or $0.11 per diluted share) due to the sale of the Atwood Southern Cross and a loss of approximately $5.5 million ($5.5 million, net of tax, or $0.08 per diluted share), due to the sale of Atwood Hunter.

Interest Expense, net of capitalized interest— For the six months ended March 31, 2016, interest expense, net of capitalized interest, increased by approximately $3.0 million to $30.9 million, as compared to $28.4 million for the six months ended March 31, 2015, primarily due to lower capitalized interest in the three months ended March 31, 2016.

Gains on extinguishment of debt— During the six months ended March 31, 2016, we repurchased, through open market transactions $13.5 million aggregate principal amount of our Senior Notes at an aggregate cost of $5.1 million, including accrued interest. As a result of the repurchases, we recognized a total gain on debt retirement, net of the write-off of debt issuance costs and premium, of $8.4 million ($8.4 million, net of tax, or $0.13 per diluted share) in Gains on extinguishment of debt on the Condensed Consolidated Statement of Operations for the three and six months ended March 31, 2016. The repurchases were made using available cash balances.

Other Income— During the six months ended March 31, 2016, we recognized approximately $18.0 million ($18.0 million, net of tax, or $0.28 per diluted share) of expected insurance recoveries related to cyclone damage to the Atwood Osprey.

Income Taxes—Our consolidated effective income tax rate for the three and six months ended March 31, 2016 was approximately 10% and 13%, as compared to for 9% and 11%, the three and six months ended March 31, 2015. The effective tax rate for the three and six months ended March 31, 2016 was higher than the rate for the three and six months ended March 31, 2015, primarily due to a change in the geographical mix of income compared to prior periods. Our effective tax rate was lower than the U.S. statutory rate of 35% as a result of working in certain lower tax jurisdictions outside the United States.

LIQUIDITY AND CAPITAL RESOURCES

Sources of Liquidity

Our sources of available liquidity include existing cash balances on hand, cash flows from operations and borrowings under our Credit Facility. In addition, we may seek to access the debt and equity capital markets in the future. Our ability to access the debt and equity capital markets depends on a number of factors, including our credit rating, industry conditions, general economic conditions, market conditions and market perceptions of us and our industry.

Our liquidity requirements include meeting ongoing working capital needs, repaying our outstanding indebtedness, and funding our capital expenditure projects. Our ability to meet these liquidity requirements will depend in large part on our future operating and financial performance.

Our cash flow fluctuates depending on a number of factors, including, among others, the number of our drilling units under contract, the day rates that we receive under those contracts, the efficiency with which we operate our drilling units, the timing of collections on outstanding accounts receivable, payments to our vendors for operating costs, and capital expenditures. We have instituted several company-wide cost savings measures, including the elimination of non-essential personnel and other operational measures, including delaying certain capital expenditure projects to reduce liquidity requirements to a level consistent with the size of our anticipated fleet operating under customer contracts over the next twelve months. We expect these activities to have a positive impact on our cash flow generation and overall liquidity. We believe that our cash on hand, cash flows generated from operating activities and available borrowings under our Credit Facility will provide sufficient liquidity over the next twelve months to fund our working capital needs, scheduled interest payments on our outstanding debt and other purposes.

As of March 31, 2016, we had $226.8 million in cash on hand. During the six months ended March 31, 2016, we relied principally on our cash flows from operations and cash on hand to meet liquidity needs and fund our cash requirements including our capital expenditures of $176.2 million. To date, general inflationary trends have not had a material effect on our operating revenues or expenses.

Cash Flows



	Six Months Ended March 31,
(In millions)	2016			2015
Net cash provided by operating activities	$	380,153		$	349,748
Net cash used in investing activities	(169,494		)	(174,606		)
Net cash used in financing activities	(97,830		)	(164,988		)

Working capital increased from $470.5 million as of September 30, 2015 to $508.9 million as of March 31, 2016. Net cash from operating activities for the six months ended March 31, 2016 was $380.2 million, as compared to $349.7 million for the six months ended March 31, 2015.

Investing Activities

Capital Expenditures

Our investing activities are primarily related to capital expenditures for property and equipment. Our capital expenditures, including maintenance capital expenditures, for the six months ended March 31, 2016 totaled $176.2 million. Our capital expenditures for the six months ended March 31, 2015 totaled $177.1 million.

As of March 31, 2016, we have expended approximately $788 million on our drilling units under construction. The Atwood Admiral and Atwood Archer were originally scheduled to be delivered in March 2015 and December 2015, respectively. On December 17, 2015, we entered into a supplemental agreement No. 4 ("Supplemental Agreement No. 4") for each rig with Daewoo Shipbuilding and Marine Engineering Co., Ltd ("DSME"), which delayed the required delivery date for these rigs to September 30, 2017 and June 30, 2018, respectively. Supplemental Agreement No. 4 superseded all previous agreements. In consideration of the agreement, we made a payment of $50 million for each drillship on December 31, 2015. All remaining milestone payments, $93.9 million for the Atwood Admiral and $305.9 million for the Atwood Archer, have been extended until their respective delivery dates. We believe that we will be able to fund all additional construction costs with cash flow from operations and borrowings under our Credit Facility. As of March 31, 2016, we estimate the remaining costs including firm commitments, project management, capitalized interest, drilling tools, handling tools and spares for our drilling units under construction to be $466 million.

Financing Activities

Our financing activities primarily consist of borrowing and repayment of long-term and short-term debt and dividend payments. Proceeds received from borrowings from our Credit Facility totaled $45 million for the six months ended March 31, 2016. Repayments on our Credit Facility totaled $115 million for the six months ended March 31, 2016.

Dividends

We paid a dividend of $0.075 per share in January 2016, that was declared in November 2015. In February 2016, our board of directors eliminated the payment of a quarterly dividend in order to preserve liquidity. The March 2016 amendment to our Credit Facility revised the restricted payments covenant to prohibit us from paying dividends during the term of the facility. Future reinstatement of dividends would require the amendment or waiver of such provision. In addition, the declaration and amount of any future dividends would be at the discretion of our board of directors and would depend on our financial condition, results of operations, cash flows, prospects, industry conditions, capital requirements and other factors and restrictions our board of directors deemed relevant. There can be no assurance that we will pay a dividend in the future.

Senior Notes

As of March 31, 2016, $636.5 million aggregate principal amount of our Senior Notes were outstanding. Our Senior Notes are unsecured obligations and are not guaranteed by any of our subsidiaries.

During the three months ended March 31, 2016, we repurchased, through open market transactions, $13.5 million aggregate principal of our Senior Notes at an aggregate cost of $5.1 million, including a minimal amount of accrued interest, representing an average discount of 62.2%. As a result of the repurchases, we recognized a gain on debt retirement, net of the related debt issuance costs, of $8.4 million (or $0.13 per diluted share) in Gains on extinguishment of debt on the Condensed Consolidated Statement of Operations for the three and six months ended March 31, 2016. In April 2016, we completed additional

repurchases of $140.7 million aggregate principal amount of our Senior Notes for $94.0 million, including $2.3 million of accrued interest, representing an average discount of 34.8%.

These repurchases, both in the period ended March 31, 2016 and in April 2016, allowed us to reduce our outstanding indebtedness and related interest expense at a significant discount to the face value of our Senior Notes. The gain associated with the repurchases is subject to tax and will increase our effective tax rate. However, due to the availability of operating loss carry-forwards the actual cash tax impact will be minimal. The repurchases were made using available cash balances. Following these repurchases, the Company has $495.8 million Senior Notes outstanding.

From time to time, we may purchase additional Senior Notes in the open market, in privately negotiated transactions, through tender offers, exchange offers or otherwise, or we may redeem Senior Notes in whole or in part at the redemption price set forth in the indenture governing the Senior Notes. Any future purchases, exchanges or redemptions will depend on various factors existing at that time. There can be no assurance as to which, if any, of these alternatives (or combinations thereof) we may choose to pursue in the future, and there can be no assurance that an active trading market will exist for the Senior Notes following any such transactions.

Revolving Credit Facility

On March 25, 2016, we entered into an amendment to our Credit Facility providing that, among other things, effective on March 28, 2016, (i) removes the maximum leverage ratio and maximum secured leverage ratio financial covenants, (ii) amends the minimum interest expense coverage ratio such that it is not applicable until the quarter ending September 30, 2018, and decreases the minimum ratio required to 1.15:1.00, (iii) adds a minimum liquidity financial covenant of $150 million, (iv) revises the restricted payments covenant to prohibit us from paying dividends, (v) reduces the total commitments under the Credit Facility by $152 million, and (vi) permits the incurrence of up to $400 million of second lien debt, subject to the parameters set forth therein. After giving effect to the amendment, commitments under the Credit Facility are $1.395 billion through May 2018 and $1.1205 billion through May 2019. As a result of the amendment, borrowings under the Credit Facility will bear interest at the Eurodollar rate plus a margin ranging from 2.50% to 3.25% and the commitment fee on the unused portion of the underlying commitment ranges from 1.00% to 1.30% per annum, in each case based on our corporate credit ratings.

In connection with the amendment, we mortgaged the Atwood Achiever, the Atwood Advantage and the Atwood Orca, as additional collateral under the Credit Facility, as well as pledged the equity interests in the subsidiaries of the Company that own, directly or indirectly, these three vessels. Additionally, the Atwood Eagle and Atwood Falcon, along with the pledged equity interests in certain of our subsidiaries that, directly or indirectly, own these two vessels, were removed as collateral under the Credit Facility. Our interest in the two drillships under construction remain unencumbered by the Credit Facility.

The following summarizes our availability under our Credit Facility as of March 31, 2016 (in millions):



Commitment under Credit Facility	$	1,395
Borrowings under Credit Facility	960
Letters of Credit Outstanding	—
Availability	$	435

Letter of Credit Facility

In July 2015, we entered into a letter of credit facility with BNP Paribas (“BNP”), pursuant to which BNP may issue letters of credit up to an unlimited stated face amount of such letters of credit. BNP has no commitment under the facility to issue letters of credit, and the facility may be canceled by BNP at any time. The facility contains certain events of default, including but not limited to delinquent payments, bankruptcy filings, material adverse judgments, cross-defaults under other debt agreements, or a change of control. As of March 31, 2016, we have not requested any letters of credits under this facility.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements as that term is defined in Item 303(a)(4)(ii) of Regulation S-K.

Commitments and Contractual Obligations

For additional information about our commitments and contractual obligations as of March 31, 2016, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Commitments and Contractual Obligations” in our Annual Report on Form 10-K for the fiscal year ended September 30, 2015. As of March 31, 2016, other than payments made under our construction contracts, further postponement of the required delivery of the drilling units under construction and repayments under our Credit Facility, there were no material changes to this disclosure regarding our commitments and contractual obligations.

FORWARD-LOOKING STATEMENTS

Statements included in this Form 10-Q regarding future financial performance, capital sources and results of operations and other statements, other than statements of historical fact, that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, and Section 21E of the Securities Exchange Act of 1934. Such statements are those concerning strategic plans, expectations and objectives for future operations and performance. When used in this report, the words “believes,” “expects,” “anticipates,” “plans,” “intends,” “estimates,” “projects,” “could,” “should,” “may,” or similar expressions are intended to be among the statements that identify forward-looking statements.

Such statements are subject to numerous risks, uncertainties and assumptions that are beyond our ability to control, including, but not limited to:


•	prices of oil and natural gas and industry expectations about future prices;


•	market conditions and level of activity in the drilling industry and the global economy in general;


•	the level of capital expenditures by our customers;


•	the termination, renegotiation, or repudiation of contracts or payment delays by our customers;


•	the operational risks involved in drilling for oil and gas;


•	the highly competitive and volatile nature of our business;


•	our ability to enter into, and the terms of, future drilling contracts, including contracts for our newbuild units, for rigs currently idled and for rigs whose contracts are expiring;


•	the impact of governmental or industry regulation, both in the United States and internationally;


•	the risks of and disruptions to international operations, including political instability and the impact of terrorist acts, acts of piracy, embargoes, war or other military operations;


•	our ability to obtain and retain qualified personnel to operate our vessels;


•	unplanned downtime and repairs on our rigs;


•	timely access to spare parts, equipment and personnel to maintain and service our fleet;


•	customer requirements for drilling capacity and customer drilling plans;


•	the adequacy of sources of liquidity for us and for our customers;


•	changes in tax laws, treaties and regulations;


•	the risks involved in the construction, upgrade, and repair of our drilling units; and


•	such other risks discussed in Item 1A. “Risk Factors” of our Form 10-K for the fiscal year ended September 30, 2015 and in our other reports filed with the Securities and Exchange Commission, or SEC.

Forward-looking statements are made based upon management’s current plans, expectations, estimates, assumptions and beliefs concerning future events impacting us and therefore involve a number of risks and uncertainties. We caution that forward-looking statements are not guarantees and that actual results could differ materially from those expressed or implied in the forward-looking statements. Undue reliance should not be placed on these forward-looking statements, which are applicable only on the date hereof. We undertake no obligation to revise or update these forward-looking statements to reflect events or circumstances that arise after the date hereof or to reflect the occurrence of unanticipated events.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to market risk, including adverse changes in interest rates and foreign currency exchange rates as discussed below.

Interest Rate Risk

The provisions of our Credit Facility provide for a variable interest rate cost on our $960 million outstanding as of March 31, 2016. However, we have employed an interest rate risk management strategy that utilizes derivative instruments with respect to $250 million of our debt as of March 31, 2016, in order to minimize unanticipated fluctuations in earnings and cash flows arising from changes in, and volatility of, interest rates. Effectively, $710 million of our variable long-term debt outstanding as of March 31, 2016, is subject to changes in interest rates. A change of 10% in the interest rate on the floating rate debt would not have a material effect on our annual earnings or cash flows.

Foreign Currency Risk

Our functional currency is the U.S. dollar. Certain of our subsidiaries have monetary assets and liabilities that are denominated in a currency other than our functional currency. The majority of our contracts are denominated in U.S. dollars, but occasionally all or a portion of a contract is payable in local currency. To the extent there is a local currency component in a contract, we attempt to match similar revenue in the local currency to the operating costs paid in the local currency such as local labor, shore base expenses, and local taxes, if any, in order to minimize foreign currency fluctuation impact.

From time to time, we enter into foreign currency forward exchange contracts to limit our exposure to fluctuations and volatility in currency exchange rates. We have outstanding foreign currency forward exchange contracts that were entered into to hedge a portion of our anticipated Eurodollar receipts associated with revenues earned. These forward contracts are designated as cash flow hedging instruments. Based on March 31, 2016 amounts, a decrease in the value of 10% in foreign currencies relative to the U.S. dollar would not have a material effect to our annual earnings or cash flows.

Market Risk

Our Senior Notes bear interest at a fixed interest rate. The fair value of our Senior Notes will fluctuate based on changes in prevailing market interest rates and market perceptions of our credit risk. The fair value of our Senior Notes was approximately $316 million as of March 31, 2016, compared to the principal amount of $636.5 million. If prevailing market interest rates had been 10% lower at March 31, 2016, the change in fair value of our Senior Notes would not have a material effect to our annual earnings or cash flows.

ITEM 4. CONTROLS AND PROCEDURES


(a)	Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this report have been designed and are effective at the reasonable assurance level so that the information required to be disclosed by us in our periodic SEC filings is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules, regulations and forms and have been accumulated and communicated to our management, including executive and financial officers, as appropriate, to allow timely decisions regarding required disclosures. We believe that a controls system, no matter how well designed and operated, cannot provide absolute assurance

that the objectives of the controls system are met, and no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within a company have been detected.


(b)	Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the most recent fiscal quarter covered by this report that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We have certain actions, claims and other matters pending as set forth in Note 8 to the Condensed Consolidated Financial Statements included in Item 1 of Part I of this Quarterly Report, which is incorporated by reference in response to this item. As of March 31, 2016, we were also involved in a number of lawsuits which have arisen in the ordinary course of business and for which we do not expect the liability, if any, resulting from these lawsuits to have a material adverse effect on our current consolidated financial position, results of operations or cash flows. We cannot predict with certainty the outcome or effect of any of these matters described above or any such other proceeding or threatened litigation or legal proceedings. There can be no assurance that our beliefs or expectations as to the outcome or effect of any lawsuit or other matters will prove correct and the eventual outcome of these matters could materially differ from management’s current estimates.

ITEM 1A. RISK FACTORS

For additional information about our risk factors, see Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2015.

ITEM 6. EXHIBITS


(a)	Exhibits





10.1†		Amendment No.1 to Atwood Oceanics, Inc. 2013 Long-Term Incentive Plan (incorporated by reference to Exhibit 4.5 of the Company's Registration Statement on Form S-8 (No. 333-209686)).

10.2		Fourth Amendment to Amended and Restated Credit Agreement, dated as of March 25, 2016, by and and among Atwood Oceanics, Inc., Atwood Oceanics Worldwide Limited, the lenders party thereto and Nordea Bank AB, London Branch, as administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on March 28, 2016).

*31.1		Certification of Chief Executive Officer.

*31.2		Certification of Chief Financial Officer.

**32.1		Certificate of Chief Executive Officer pursuant to Section 906 of Sarbanes – Oxley Act of 2002.

**32.2		Certificate of Chief Financial Officer pursuant to Section 906 of Sarbanes – Oxley Act of 2002.

*101		Interactive data files.

*		Filed herewith

**		Furnished herewith

†		Management contract or compensatory plan or arrangement

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.




		ATWOOD OCEANICS, INC.
		(Registrant)

Date:	May 6, 2016	/S/ MARK W. SMITH
		Mark W. Smith
		Senior Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)




Date:	May 6, 2016	/S/ ROBERT J. SALTIEL
		ROBERT J. SALTIEL
		President and Chief Executive Officer




Date:	May 6, 2016	/S/ ROBERT J. SALTIEL
		ROBERT J. SALTIEL
		President and Chief Executive Officer

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Mar. 31, 2016	May. 03, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	ATWOOD OCEANICS INC
Entity Central Index Key	0000008411
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		64,797,106
Trading Symbol	atw

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	180,000,000	180,000,000
Common stock, issued (in shares)	64,794,000	64,654,000
Common stock, outstanding (in shares)	64,794,000	64,654,000

Unaudited Interim Information	6 Months Ended
Unaudited Interim Information	Mar. 31, 2016
Accounting Policies [Abstract]
Unaudited Interim Information	UNAUDITED INTERIM INFORMATION The accompanying unaudited condensed consolidated financial statements of Atwood Oceanics, Inc. and its subsidiaries as of March 31, 2016 and for the three and six months ended March 31, 2016 and 2015, have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information. Unless otherwise indicated, references to “we”, “us”, “our” and the “Company” refer collectively to Atwood Oceanics, Inc. and subsidiaries. The year-end condensed consolidated balance sheet data was derived from the audited financial statements as of September 30, 2015. Although these financial statements and related information have been prepared without audit and certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, we believe that the note disclosures are adequate to make the information not misleading. The interim financial results may not be indicative of results that could be expected for a full fiscal year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes included in our Annual Report on Form 10-K for the year ended September 30, 2015. In our opinion, the unaudited interim financial statements reflect all adjustments considered necessary for a fair statement of our financial position, results of operations, changes in shareholders' equity, and cash flows for the periods presented. Certain prior period amounts have been reclassified to conform to current year presentation. Recently issued accounting pronouncements In March 2016, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (ASU), “Improvements to Employee Share-Based Payment Accounting,” as part of its simplification initiative. The ASU simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities, and classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes.The amendments in this update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): Amendments to the FASB Accounting Standards Codification ("Update 2016-02"), which requires an entity to recognize lease assets and lease liabilities on the balance sheet and to disclose key qualitative and quantitative information about the entity's leasing arrangements. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. A modified retrospective approach is required. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In November 2015, amended guidance from the FASB was issued for the balance sheet classification of deferred income taxes. The amended guidance requires the classification of all deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. Deferred tax assets and liabilities will continue to be offset and presented as a single amount under the amended guidance. The effective date for public business entities is for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We have not yet adopted nor selected a transition method and are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In April 2015, the FASB issued new guidance intended to simplify the presentation of debt issuance costs. This new guidance requires that debt issuance costs related to outstanding debt be netted against that liability in the balance sheet, consistent with the treatment of debt discounts. In August 2015, the FASB issued additional guidance to clarify that this presentation change does not address debt issuance costs related to line of credit arrangements. The new presentation guidance is effective for fiscal years and interim periods beginning after December 15, 2015 and early adoption is permitted. We adopted this guidance in the first quarter of fiscal 2016. We reclassified $1.7 million from Prepaid Expenses, Deferred Costs and Other Current Assets and $6.0 million from Deferred Costs and Other Assets to Long-Term Debt in the September 30, 2015 Condensed Consolidated Balance Sheet presented in this Form 10-Q to conform to the current year presentation of debt issuance costs. In May 2014, the FASB issued new guidance intended to change the criteria for recognition of revenue. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.


1.	I have reviewed this quarterly report on Form 10-Q of Atwood Oceanics, 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(s) 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; and


(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


(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.


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


(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the periods presented.

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
REVENUES:
Contract drilling	$ 282,546	$ 338,621	$ 577,161	$ 675,382
Revenues related to reimbursable expenses	13,805	11,766	27,009	26,731
Total revenues	296,351	350,387	604,170	702,113
COSTS AND EXPENSES:
Contract drilling	89,918	131,124	220,570	267,589
Reimbursable expenses	9,123	8,661	17,409	20,568
Depreciation	41,053	42,528	83,880	87,103
General and administrative	11,488	14,737	26,665	32,146
Asset impairment	708	0	65,432	60,777
Loss on sale of assets	77	5,529	77	15,335
Other, net	(1,137)	0	(1,060)	0
Total costs and expenses	151,230	202,579	412,973	483,518
OPERATING INCOME	145,121	147,808	191,197	218,595
OTHER INCOME (EXPENSE):
Interest expense, net of capitalized interest	(17,098)	(12,847)	(30,859)	(28,351)
Interest income	6	15	10	72
Gains on extinguishment of debt	8,397	0	8,397	0
Other income	0	0	17,976	0
Other income (expense) total	(8,695)	(12,832)	(4,476)	(28,279)
INCOME BEFORE INCOME TAXES	136,426	134,976	186,721	190,316
PROVISION FOR INCOME TAXES	13,989	12,307	25,203	21,429
NET INCOME	$ 122,437	$ 122,669	$ 161,518	$ 168,887
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 1.89	$ 1.90	$ 2.49	$ 2.62
Diluted (in dollars per share)	$ 1.89	$ 1.89	$ 2.49	$ 2.60
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	64,781	64,620	64,739	64,513
Diluted (in shares)	64,825	65,048	64,870	65,031

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
ASSETS
Cash	$ 226,812	$ 113,983
Accounts receivable, net	240,740	311,514
Income tax receivable	8,198	8,705
Inventories of materials and supplies, net	110,029	137,998
Prepaid expenses, deferred costs and other current assets	18,790	33,735
Total current assets	604,569	605,935
Property and equipment, net	4,209,558	4,172,132
Other receivables	11,831	11,831
Deferred income taxes	150	150
Deferred costs and other assets	8,884	11,285
Total assets	4,834,992	4,801,333
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	43,878	70,161
Accrued liabilities	19,294	23,572
Dividends payable	0	16,164
Interest payable	8,222	7,704
Income tax payable	20,440	13,906
Deferred credits and other liabilities	3,834	3,941
Total current liabilities	95,668	135,448
Long-term debt	1,595,018	1,678,268
Deferred income taxes	1,096	1,658
Deferred credits	71	800
Other	38,032	37,989
Total long-term liabilities	$ 1,634,217	$ 1,718,715
Commitments and contingencies
Preferred stock, no par value, 1,000 shares authorized, none outstanding	$ 0	$ 0
Common stock, $1.00 par value, 180,000 shares authorized with 64,794 issued and outstanding as of March 31, 2016 and 180,000 shares authorized and 64,654 shares issued and outstanding as of September 30, 2015	64,794	64,654
Paid-in capital	217,037	213,096
Retained earnings	2,826,084	2,670,148
Accumulated other comprehensive income	(2,808)	(728)
Total shareholders' equity	3,105,107	2,947,170
Total liabilities and shareholders' equity	$ 4,834,992	$ 4,801,333

Condensed Consolidated Statement of Changes In Shareholders' Equity (Unaudited) - 6 months ended Mar. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Sep. 30, 2015		64,654
Beginning Balance at Sep. 30, 2015	$ 2,947,170	$ 64,654	$ 213,096	$ 2,670,148	$ (728)
Increase (Decrease) in Stockholders' Equity
Net income	161,518			161,518
Other comprehensive income	(2,080)				(2,080)
Dividends	(5,582)			(5,582)
Vesting of restricted stock and performance unit awards (in shares)		140
Vesting of restricted stock and performance unit awards	(928)	$ 140	(1,068)
Stock compensation expense	5,009		5,009
Ending Balance (in shares) at Mar. 31, 2016		64,794
Ending Balance at Mar. 31, 2016	$ 3,105,107	$ 64,794	$ 217,037	$ 2,826,084	$ (2,808)

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 161,518	$ 168,887
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	83,880	87,103
Amortization	1,607	3,761
Provision for doubtful accounts	1,141	160
Deferred income tax benefit	(650)	(3,512)
Share-based compensation expense	5,009	8,119
Asset impairment	65,432	60,777
Loss on sale of assets	77	15,335
(Gain) on extinguishment of debt	(8,397)	0
Other, net	(1,137)	0
Changes in assets and liabilities:
Accounts receivable	62,963	15,829
Income tax receivable	507	(3,604)
Inventories of materials and supplies	16,187	(17,110)
Prepaid expenses, deferred costs and other current assets	14,709	9,789
Deferred costs and other assets	(1,381)	(357)
Accounts payable	(25,306)	2,825
Accrued liabilities	(3,760)	(3,691)
Income tax payable	6,534	(310)
Deferred credits and other liabilities	1,220	5,747
Net cash provided by operating activities	380,153	349,748
Cash flows from investing activities:
Capital expenditures	(176,175)	(177,130)
Proceeds from sale of assets	6,681	2,524
Net cash used in investing activities	(169,494)	(174,606)
Cash flows from financing activities:
Proceeds from borrowing of long-term debt	45,000	0
Principal repayments on long-term debt	(120,156)	(135,000)
Repayments on short-term debt, net	0	(11,885)
Dividends paid	(21,746)	(16,163)
Proceeds (payments) related to exercise of stock options	(928)	1,186
Debt issuance costs paid	0	(3,126)
Net cash used by financing activities	(97,830)	(164,988)
Net increase in cash and cash equivalents	112,829	10,154
Cash and cash equivalents, at beginning of period	113,983	80,080
Cash and cash equivalents, at end of period	226,812	90,234
Non-cash activities:
Increase (decrease) in accounts payable and accrued liabilities related to capital expenditures	$ 950	$ 3,020

Income Taxes	6 Months Ended
Income Taxes	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our consolidated effective income tax rate for the three and six months ended March 31, 2016 was approximately 10% and 13%, as compared to 9% and 11% for the three and six months ended March 31, 2015. The effective tax rate for the three and six months ended March 31, 2016 was higher than the rate for the three and six months ended March 31, 2015, primarily due to a change in the geographical mix of income compared to prior periods. Our effective tax rate was lower than the U.S. statutory rate of 35% as a result of working in certain lower tax jurisdictions outside the United States. We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense. As of March 31, 2016, we had approximately $16.0 million of reserves for uncertain tax positions, including estimated accrued interest and penalties of $3.9 million, which are included in Other long-term liabilities in the Consolidated Balance Sheet. None of our reserves for uncertain tax positions relate to timing differences. All of the net uncertain tax liabilities would affect the effective tax rate if realized.

Commitments And Contingencies	6 Months Ended
Commitments And Contingencies	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Litigation We are party to a number of lawsuits which are ordinary, routine litigation incidental to our business, the outcome of which is not expected to have, either individually or in the aggregate, a material adverse effect on our financial position, results of operations or cash flows. Other Matters The Atwood Beacon operated in India from early December 2006 to the end of July 2009. A service tax was enacted in India in 2004 on revenues derived from seismic and exploration activities. This service tax law was subsequently amended in June 2007 and again in May 2008 to state that revenues derived from mining services and drilling services were specifically subject to this service tax. The contract terms with our customer in India provided that any liability incurred by us related to any tax obligation pursuant to laws not in effect at the time the contract was executed in 2005 was to be reimbursed by our customer. We believe any service taxes assessed by the Indian tax authorities under the 2007 or 2008 amendments are an obligation of our customer. Our customer is disputing this obligation on the basis of its contention that revenues derived from drilling services were taxable under the initial 2004 law, and are, therefore, our obligation. After reviewing the status of the drilling services we provided to our customer, the Indian tax authorities assessed service tax obligations on revenues derived from the Atwood Beacon commencing on June 1, 2007. The relevant Indian tax authority issued an extensive written ruling setting forth the application of the June 1, 2007 service tax regulation and confirming the position that drilling services, including the services performed under our contract with our customer prior to June 1, 2007, were not covered by the 2004 service tax law. In August 2012, the Indian Custom Excise and Service Tax Appellate Tribunal issued an Order in our favor confirming our position that service tax did not apply to drilling services performed prior to June 1, 2007. The Indian Service Tax Authority has appealed this ruling to the Indian Supreme Court. As of March 31, 2016, we had paid to the Indian government $10.5 million in service taxes and have accrued $1.3 million of additional service tax obligations in accrued liabilities on our consolidated balance sheets, for a total of $11.8 million relating to service taxes. We recorded a corresponding $11.8 million long-term other receivable due from our customer relating to service taxes due under the contract. We continue to pursue collection of such amounts from our customer and expect to collect the amount recorded.

Subsequent Events	6 Months Ended
Subsequent Events	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On April 13, 2016, the Atwood Falcon sale and recycling transaction closed and title of the vessel and associated equipment and machinery transferred to a third party buyer (see Note 3). In April 2016, we completed additional repurchases of $140.7 million aggregate principal amount of our Senior Notes for $94.0 million, including $2.3 million of accrued interest, representing an average discount of 34.8%. These repurchases, both in the period ended March 31, 2016 and in April 2016, allowed us to reduce our outstanding indebtedness and related interest expense at a significant discount to the face value of our Senior Notes. The repurchases were made using available cash balances. Following these repurchases, the Company has $495.8 million Senior Notes outstanding.

Unaudited Interim Information (Policies)	6 Months Ended
Unaudited Interim Information (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Recently Issued Accounting Pronouncements	Recently issued accounting pronouncements In March 2016, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (ASU), “Improvements to Employee Share-Based Payment Accounting,” as part of its simplification initiative. The ASU simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities, and classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes.The amendments in this update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): Amendments to the FASB Accounting Standards Codification ("Update 2016-02"), which requires an entity to recognize lease assets and lease liabilities on the balance sheet and to disclose key qualitative and quantitative information about the entity's leasing arrangements. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. A modified retrospective approach is required. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In November 2015, amended guidance from the FASB was issued for the balance sheet classification of deferred income taxes. The amended guidance requires the classification of all deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. Deferred tax assets and liabilities will continue to be offset and presented as a single amount under the amended guidance. The effective date for public business entities is for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We have not yet adopted nor selected a transition method and are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In April 2015, the FASB issued new guidance intended to simplify the presentation of debt issuance costs. This new guidance requires that debt issuance costs related to outstanding debt be netted against that liability in the balance sheet, consistent with the treatment of debt discounts. In August 2015, the FASB issued additional guidance to clarify that this presentation change does not address debt issuance costs related to line of credit arrangements. The new presentation guidance is effective for fiscal years and interim periods beginning after December 15, 2015 and early adoption is permitted. We adopted this guidance in the first quarter of fiscal 2016. We reclassified $1.7 million from Prepaid Expenses, Deferred Costs and Other Current Assets and $6.0 million from Deferred Costs and Other Assets to Long-Term Debt in the September 30, 2015 Condensed Consolidated Balance Sheet presented in this Form 10-Q to conform to the current year presentation of debt issuance costs. In May 2014, the FASB issued new guidance intended to change the criteria for recognition of revenue. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.
Fair Value Measurement	We have certain assets and liabilities that are required to be measured and disclosed at fair value. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value into three levels. Priority is given to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, takes into account the market for our financial assets and liabilities, the associated credit risk and other considerations. We have classified and disclosed fair value measurements using the following levels of the fair value hierarchy: Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).
Income Taxes	We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense.

Unaudited Interim Information (Details) - Accounting Standards Update 2015-03 $ in Millions	Sep. 30, 2015 USD ($)
Prepaid expenses, deferred costs and other current assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs, current	$ (1.7)
Deferred credits and other assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs, noncurrent	(6.0)
Long-term debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs, current	1.7
Deferred finance costs, noncurrent	$ 6.0

Property and Equipment - Summary of Property and Equipment by Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Property, Plant and Equipment
Total cost	$ 4,857,978	$ 4,815,962
Less: Accumulated depreciation	(648,420)	(643,830)
Property and equipment, net	4,209,558	4,172,132
Drilling vessels and equipment
Property, Plant and Equipment
Total cost	3,944,409	4,003,483
Construction work in progress
Property, Plant and Equipment
Total cost	818,580	720,852
Drill pipe
Property, Plant and Equipment
Total cost	55,768	55,248
Office equipment and other
Property, Plant and Equipment
Total cost	$ 39,221	$ 36,379

Property and Equipment - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended				6 Months Ended
	Dec. 31, 2015	Dec. 17, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment
Asset impairment			$ 708		$ 0		$ 65,432	$ 60,777
(Gain) loss on sale of equipment			(77)		$ (5,529)		(77)	$ (15,335)
Atwood Falcon
Property, Plant and Equipment
Asset impairment			700	$ 64,700			65,432
Long lived assets held for sale			$ 1,300				1,300
Impairment, net of tax				$ 64,700
Impairment effect on earnings per share, after tax (in dollars per share)				$ 1.00
Atwood Falcon \| Equipment
Property, Plant and Equipment
Asset impairment				$ 53,000
Atwood Falcon \| Inventory
Property, Plant and Equipment
Asset impairment				11,700
Atwood Hunter
Property, Plant and Equipment
Asset impairment						$ 60,800
Impairment, net of tax						$ 56,100	$ 5,500
Impairment effect on earnings per share, after tax (in dollars per share)						$ 0.86	$ 0.08
(Gain) loss on sale of equipment							$ (5,500)
Atwood Hunter \| Equipment
Property, Plant and Equipment
Asset impairment						$ 48,000
Atwood Hunter \| Inventory
Property, Plant and Equipment
Asset impairment						$ 8,400
Atwood Osprey
Property, Plant and Equipment
Insurance recoveries				18,000
Insurance recoveries, net of tax				$ 18,000
Insurance recoveries effect on earnings per share, after tax (in dollars per share)				$ 0.28
Atwood Southern Cross
Property, Plant and Equipment
Impairment, net of tax							$ 7,100
Impairment effect on earnings per share, after tax (in dollars per share)							$ 0.11
(Gain) loss on sale of equipment							$ (8,000)
Atwood Admiral
Property, Plant and Equipment
Accelerated delivery notice period							45 days
Atwood Admiral \| Capital Addition Purchase Commitments
Property, Plant and Equipment
Payments for construction projects	$ 50,000
Atwood Admiral \| Capital Addition Purchase Commitments \| Final Payment
Property, Plant and Equipment
Commitments on drilling units under construction		$ 93,900
Atwood Archer
Property, Plant and Equipment
Accelerated delivery notice period							45 days
Atwood Archer \| Capital Addition Purchase Commitments
Property, Plant and Equipment
Payments for construction projects	$ 50,000
Atwood Archer \| Capital Addition Purchase Commitments \| Final Payment
Property, Plant and Equipment
Commitments on drilling units under construction		$ 305,900

Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Debt Instrument [Line Items]
Long-term debt	$ 1,595,018	$ 1,678,268
Senior Notes \| 6.5% Senior Notes
Debt Instrument [Line Items]
Stated interest rate	6.50%	6.50%
Long-term debt	$ 635,018	$ 648,268
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 960,000	$ 1,030,000

Debt - Credit Facility (Details)		3 Months Ended		6 Months Ended
Debt - Credit Facility (Details)	Mar. 25, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Weighted average interest rate		4.30%		4.30%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Minimum interest expense coverage ratio	1.15
Minimum liquidity financial covenant	$ 150,000,000
Long-term line of credit, reduction in borrowing capacity		$ 152,000,000		$ 152,000,000
Long-term line of credit, maximum borrowing capacity		1,395,000,000		1,395,000,000
Long-term line of credit		960,000,000		960,000,000
Long-term line of credit, remaining borrowing capacity		435,000,000		435,000,000
Interest costs capitalized		3,800,000	$ 4,000,000	8,400,000	$ 9,000,000
Revolving Credit Facility \| Minimum \| Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
Unused capacity commitment fee	1.00%
Revolving Credit Facility \| Maximum \| Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.25%
Unused capacity commitment fee	1.30%
Revolving Credit Facility, Maturing May 2018 \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term line of credit, maximum borrowing capacity	$ 1,395,000,000.000	275,000,000		275,000,000
Revolving Credit Facility, Maturing May 2019 \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term line of credit, maximum borrowing capacity	1,120,500,000.0000	$ 1,120,000,000		$ 1,120,000,000
Junior Lien \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term line of credit, maximum borrowing capacity	$ 400,000,000

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term debt, carrying value	$ 1,595,018	$ 1,678,268
Credit valuation adjustment to total fair value percentage (less than)	1.00%
Senior Notes \| 6.5% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term debt, carrying value	$ 635,018	$ 648,268
Principal amount	636,500
Long-term debt, fair value	$ 316,000

Fair Value of Financial Instruments - Estimated Fair Value of Financial Instruments (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total derivative contracts, net	$ (2,853)	$ 1,522
Prepaid expenses, deferred costs and other current assets \| Foreign currency forwards \| Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets designated as hedges	0	3,822
Accrued liabilities \| Interest rate swap \| Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative liabilities designated as hedges	(1,570)	(1,326)
Deferred credits and other liabilities \| Foreign currency forwards \| Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative liabilities designated as hedges	(193)	0
Other long-term liabilities \| Interest rate swap \| Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative liabilities designated as hedges	$ (1,090)	$ (974)

Share-Based Compensation - Schedule of Share Based Compensation Expense (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation recognized	$ 5,009	$ 8,119
Unrecognized compensation cost, net of estimated forfeitures	$ 21,469	$ 26,310
Remaining weighted average service period (Years)	2 years 1 month 6 days	2 years

Share-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock shares in Thousands	6 Months Ended
	Mar. 31, 2016 $ / shares shares
Number of Shares:
Unvested at beginning of period (in shares) \| shares	711
Granted (in shares) \| shares	642
Vested (in shares) \| shares	(190)
Forfeited (in shares) \| shares	(76)
Unvested at end of period (in shares) \| shares	1,087
Weighted Average Fair Value:
Unvested at beginning of period (in dollars per share) \| $ / shares	$ 43.14
Granted (in dollars per share) \| $ / shares	14.32
Vested (in dollars per share) \| $ / shares	44.96
Forfeited (in dollars per share) \| $ / shares	32.10
Unvested at end of period (in dollars per share) \| $ / shares	$ 26.15

Share-Based Compensation - Summary of Stock Option Activity (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Number of Options:
Outstanding at beginning of period (shares) \| shares	685
Granted (shares) \| shares	0
Exercised (shares) \| shares	0
Forfeited (shares) \| shares	0
Expired (Shares) \| shares	(17)
Outstanding at end of period (shares) \| shares	668
Exercisable at end of period (shares) \| shares	668
Weighted Average Exercise Price (in dollars per share):
Outstanding at beginning of period (dollars per share) \| $ / shares	$ 34.90
Granted (dollars per share) \| $ / shares	0.00
Exercised (dollars per share) \| $ / shares	0.00
Forfeited (dollars per share) \| $ / shares	0.00
Expired (dollars per share) \| $ / shares	27.25
Outstanding at end of period (dollars per share) \| $ / shares	35.10
Exercisable at end of period (dollars per share) \| $ / shares	$ 35.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual life, outstanding	3 years 9 months 18 days
Weighted average remaining contractual life, outstanding, exercisable	3 years 9 months 18 days
Aggregate intrinsic value, exercised in period \| $	$ 0
Aggregate intrinsic value, outstanding \| $	(17,325)
Aggregate intrinsic value, exercisable \| $	$ (17,325)