10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

(Mark One)

ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2017.

or

o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from  _______________ to _______________

Commission File No. 1-13998

Insperity, Inc.

(Exact name of registrant as specified in its charter)

Delaware	76-0479645
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
19001 Crescent Springs Drive
Kingwood, Texas	77339
(Address of principal executive offices)	(Zip Code)

(Registrant’s Telephone Number, Including Area Code):  (281) 358-8986

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 ý  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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes ý  No o

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

Large accelerated filer ý	Accelerated filer o	Non-accelerated filer o	(Do not check if a Smaller reporting company)
Smaller reporting company o	Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. 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 ý

As of July 25, 2017, 20,846,440 shares of the registrant’s common stock, par value $0.01 per share, were outstanding.

	TABLE OF CONTENTS
	Part I
Item 1.	Financial Statements	3
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	26
Item 4.	Controls and Procedures	27
Part II
Item 1.	Legal Proceedings	28
Item 1a.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	29
Item 6.	Exhibits	30

PART I

ITEM 1.  FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands)

ASSETS

	June 30, 2017			December 31, 2016
	(Unaudited)
Current assets:
Cash and cash equivalents	$	241,890		$	286,034
Restricted cash	41,703			42,637
Marketable securities	1,929			1,851
Accounts receivable, net:
Trade	2,775			13,107
Unbilled	255,184			254,999
Other	3,610			2,178
Prepaid insurance	27,070			15,041
Other current assets	17,993			19,526
Income taxes receivable	6,878			4,949
Total current assets	599,032			640,322
Property and equipment:
Land	6,215			5,214
Buildings and improvements	94,318			90,151
Computer hardware and software	101,003			97,311
Software development costs	56,584			51,956
Furniture, fixtures and other	41,826			38,483
	299,946			283,115
Accumulated depreciation and amortization	(207,288		)	(202,854		)
Total property and equipment, net	92,658			80,261
Other assets:
Prepaid health insurance	9,000			9,000
Deposits – health insurance	5,300			4,700
Deposits – workers’ compensation	157,850			143,938
Goodwill and other intangible assets, net	12,838			13,088
Deferred income taxes, net	5,560			14,025
Other assets	3,650			1,840
Total other assets	194,198			186,591
Total assets	$	885,888		$	907,174

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INSPERITY, INC.

CONSOLIDATED BALANCE SHEETS (Continued)

(in thousands)

LIABILITIES AND STOCKHOLDERS’ EQUITY

	June 30, 2017			December 31, 2016
	(Unaudited)
Current liabilities:
Accounts payable	$	3,132		$	4,189
Payroll taxes and other payroll deductions payable	189,940			247,766
Accrued worksite employee payroll cost	228,556			215,214
Accrued health insurance costs	26,579			26,360
Accrued workers’ compensation costs	43,939			44,231
Accrued corporate payroll and commissions	28,566			40,761
Other accrued liabilities	22,658			22,437
Total current liabilities	543,370			600,958
Noncurrent liabilities:
Accrued workers’ compensation costs	154,415			141,291
Long-term debt	104,400			104,400
Total noncurrent liabilities	258,815			245,691
Commitments and contingencies
Stockholders’ equity:
Common stock	277			277
Additional paid-in capital	15,462			9,240
Treasury stock, at cost	(248,266		)	(227,152		)
Retained earnings	316,230			278,160
Total stockholders’ equity	83,703			60,525
Total liabilities and stockholders’ equity	$	885,888		$	907,174

See accompanying notes.

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INSPERITY, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

(Unaudited)

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017			2016			2017			2016
Revenues (gross billings of $4.742 billion, $4.163 billion, $9.758 billion and $8.727 billion less worksite employee payroll cost of $3.947 billion, $3.456 billion, $8.080 billion and $7.217 billion, respectively)	$	795,552		$	707,332		$	1,678,216		$	1,509,740
Direct costs:
Payroll taxes, benefits and workers’ compensation costs	664,999			594,073			1,388,317			1,246,465
Gross profit	130,553			113,259			289,899			263,275
Operating expenses:
Salaries, wages and payroll taxes	61,458			55,998			123,915			114,013
Stock-based compensation	5,303			4,761			9,806			8,336
Commissions	5,664			4,335			10,140			8,616
Advertising	6,175			6,712			10,147			9,759
General and administrative expenses	24,610			21,254			50,802			45,038
Depreciation and amortization	4,405			4,176			8,659			8,447
	107,615			97,236			213,469			194,209
Operating income	22,938			16,023			76,430			69,066
Other income (expense):
Interest income	678			293			1,143			592
Interest expense	(803		)	(650		)	(1,426		)	(1,287		)
Income before income tax expense	22,813			15,666			76,147			68,371
Income tax expense	8,795			5,953			26,501			25,965
Net income	$	14,018		$	9,713		$	49,646		$	42,406
Less distributed and undistributed earnings allocated to participating securities	(248		)	(229		)	(909		)	(962		)
Net income allocated to common shares	$	13,770		$	9,484		$	48,737		$	41,444
Basic net income per share of common stock	$	0.67		$	0.45		$	2.37		$	1.98
Diluted net income per share of common stock	$	0.66		$	0.45		$	2.35		$	1.98

See accompanying notes.

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INSPERITY, INC.

CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY

SIX MONTHS ENDED JUNE 30, 2017

(in thousands)

(Unaudited)

	Common Stock Issued			Additional Paid-In Capital		Treasury Stock			Retained Earnings			Total
	Shares	Amount
Balance at December 31, 2016	27,744	$	277	$	9,240	$	(227,152	)	$	278,160		$	60,525
Purchase of treasury stock, at cost	—	—		—		(25,528		)	—			(25,528		)
Stock-based compensation expense	—	—		5,746		4,060			—			9,806
Other	—	—		476		354			3			833
Dividends paid	—	—		—		—			(11,579		)	(11,579		)
Net income	—	—		—		—			49,646			49,646
Balance at June 30, 2017	27,744	$	277	$	15,462	$	(248,266	)	$	316,230		$	83,703

See accompanying notes.

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INSPERITY, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

	Six Months Ended   June 30,
	2017			2016
Cash flows from operating activities:
Net income	$	49,646		$	42,406
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,659			8,447
Stock-based compensation	9,806			8,336
Deferred income taxes	8,465			9,414
Changes in operating assets and liabilities:
Restricted cash	934			(3,808		)
Accounts receivable	8,715			(44,347		)
Prepaid insurance	(12,029		)	(19,128		)
Other current assets	1,533			(1,419		)
Other assets	(16,287		)	4,156
Accounts payable	(1,057		)	(1,835		)
Payroll taxes and other payroll deductions payable	(57,826		)	(64,180		)
Accrued worksite employee payroll expense	13,342			115,459
Accrued health insurance costs	219			13,277
Accrued workers’ compensation costs	12,832			15,176
Accrued corporate payroll, commissions and other accrued liabilities	(11,974		)	(11,627		)
Income taxes payable/receivable	(1,929		)	(9,661		)
Total adjustments	(36,597		)	18,260
Net cash provided by operating activities	13,049			60,666
Cash flows from investing activities:
Marketable securities:
Purchases	(919		)	(310		)
Proceeds from dispositions	—			7,268
Proceeds from maturities	805			990
Property and equipment:
Purchases	(20,802		)	(12,647		)
Net cash used in investing activities	(20,916		)	(4,699		)

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INSPERITY, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(in thousands)

(Unaudited)

	Six Months Ended   June 30,
	2017			2016
Cash flows from financing activities:
Purchase of treasury stock	$	(25,528	)	$	(4,790	)
Repurchase of common stock	—			(144,263		)
Dividends paid	(11,579		)	(9,997		)
Borrowings under long-term debt agreement	—			124,400
Principal repayments	—			(20,000		)
Other	830			718
Net cash used in financing activities	(36,277		)	(53,932		)
Net increase (decrease) in cash and cash equivalents	(44,144		)	2,035
Cash and cash equivalents at beginning of period	286,034			269,538
Cash and cash equivalents at end of period	$	241,890		$	271,573

See accompanying notes.

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INSPERITY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

June 30, 2017

(Unaudited)

1. Basis of Presentation

Insperity, Inc., a Delaware corporation (“Insperity,” “we,” “our,” and “us”), provides an array of human resources (“HR”) and business solutions designed to help improve business performance. Our most comprehensive HR services offerings are provided through our professional employer organization (“PEO”) services, known as Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of HR functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management, and training and development services, along with our cloud-based human capital management platform, the Employee Service Center^TM.

In addition to our PEO HR Outsourcing solutions, we offer a number of other business performance solutions, including Human Capital Consulting, Payroll & Human Capital Management, Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Financial and Expense Management Services, Retirement Services and Insurance Services, a number of which are offered via desktop applications and cloud-based delivery models. These other products and services are offered separately, along with our PEO HR Outsourcing solutions or as a bundle, such as our new Workforce Administration^TM solution that provides a comprehensive human capital management and payroll services solution.

The Consolidated Financial Statements include the accounts of Insperity and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes.  Actual results could differ from those estimates.

The accompanying Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements at and for the year ended December 31, 2016. Our Consolidated Balance Sheet at December 31, 2016 has been derived from the audited financial statements at that date, but does not include all of the information or footnotes required by GAAP for complete financial statements.  Our Consolidated Balance Sheet at June 30, 2017 and our Consolidated Statements of Operations for the three and six month periods ended June 30, 2017 and 2016, our Consolidated Statements of Cash Flows for the six month periods ended June 30, 2017 and 2016, and our Consolidated Statement of Stockholders’ Equity for the six month period ended June 30, 2017, have been prepared by us without audit. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary to present fairly the consolidated financial position, results of operations and cash flows, have been made. Certain prior year amounts have been reclassified to conform to the 2017 presentation.

The results of operations for the interim periods are not necessarily indicative of the operating results for a full year or of future operations.

2. Accounting Policies

Health Insurance Costs

We provide group health insurance coverage to our worksite employees in our PEO HR Outsourcing solutions through a national network of carriers, including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield, and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the costs of the United plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense in our Consolidated Statements of Operations. The estimated incurred

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claims are based upon: (i) the level of claims processed during the quarter; (ii) estimated completion rates based upon recent claim development patterns under the plan; and (iii) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $5.1 million as of June 30, 2017, and is reported as a long-term asset. As of June 30, 2017, Plan Costs were less than the net premiums paid and owed to United by $22.6 million. As this amount is in excess of the agreed-upon $9.0 million surplus maintenance level, the $13.6 million difference is included in prepaid insurance, a current asset, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at June 30, 2017 were $22.4 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred in the first six months of 2017 included costs of $0.5 million for changes in estimated run-off related to prior periods.

Workers’ Compensation Costs

Our workers’ compensation coverage for our worksite employees in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $5 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We employ a third party actuary to estimate our loss development rate, which is primarily based upon the nature of worksite employees’ job responsibilities, the location of worksite employees, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the six months ended June 30,2017 and 2016, we reduced accrued workers’ compensation costs by $8.0 million and $2.6 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate utilized in the 2017 period was 1.5% and in the 2016 period was 1.0%) and are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

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The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Six Months Ended   June 30,
	2017			2016
	(in thousands)
Beginning balance, January 1,	$	183,928		$	162,184
Accrued claims	34,242			35,045
Present value discount	(2,008		)	(1,274		)
Paid claims	(20,044		)	(19,038		)
Ending balance	$	196,118		$	176,917
Current portion of accrued claims	$	41,703		$	41,236
Long-term portion of accrued claims	154,415			135,681
	$	196,118		$	176,917

The current portion of accrued workers’ compensation costs on our Consolidated Balance Sheets at June 30, 2017 includes $2.2 million of workers’ compensation administrative fees.

As of June 30, 2017 and 2016, the undiscounted accrued workers’ compensation costs were $207.2 million and $187.0 million, respectively.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated worksite employee payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits - workers’ compensation, a long-term asset in our Consolidated Balance Sheets. As of June 30, 2017, we had restricted cash of $41.7 million and deposits - workers’ compensation of $157.9 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in long-term liabilities on our Consolidated Balance Sheets.

New Accounting Pronouncements

We believe we have implemented the accounting pronouncements with a material impact on our financial statements and do not believe there are any new or pending pronouncements that will materially impact our financial position or results of operations, other than discussed below.

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 is effective for annual reporting periods beginning after December 15, 2017, and early adoption is permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt ASU No. 2014-09. We plan to adopt ASU 2014-09 effective January 1, 2018 using the modified retrospective method. Under this method, the guidance will be applied only to the most current period presented in the financial statements. While our technical analysis is on-going, we expect our revenue recognition policies to remain substantially unchanged as a result of adopting ASU 2014-09. Additionally, we do not anticipate significant changes in business processes or systems.

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning

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after December 15, 2018. We are currently reviewing the guidance and assessing the impact on our consolidated financial statements.

3. Cash, Cash Equivalents and Marketable Securities

The following table summarizes our cash and investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	June 30, 2017			December 31, 2016
	(in thousands)
Overnight holdings
Money market funds (cash equivalents)	$	201,660		$	255,091
Investment holdings
Money market funds (cash equivalents)	28,567			28,231
Marketable securities	1,929			1,851
	232,156			285,173
Cash held in demand accounts	27,586			25,758
Outstanding checks	(15,923		)	(23,046		)
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885
Cash and cash equivalents	$	241,890		$	286,034
Marketable securities	1,929			1,851
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885

Our cash and overnight holdings fluctuate based on the timing of clients’ payroll processing cycles. Included in the cash, cash equivalents and marketable securities at June 30, 2017 and December 31, 2016, are $173.3 million and $221.7 million, respectively, of funds associated with federal and state income tax withholdings, employment taxes and other payroll deductions, as well as $22.3 million and $21.3 million in client prepayments, respectively.

4. Fair Value Measurements

We account for our financial assets in accordance with Accounting Standard Codification 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

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Fair Value of Instruments Measured and Recognized at Fair Value

The following table summarizes the levels of fair value measurements of our financial assets:

	Fair Value Measurements
	(in thousands)
	June 30, 2017		Level 1		Level 2		Level 3
Money market funds	$	230,227	$	230,227	$	—	$	—
Municipal bonds	1,929		—		1,929		—
Total	$	232,156	$	230,227	$	1,929	$	—

	Fair Value Measurements
	(in thousands)
	December 31, 2016		Level 1		Level 2		Level 3
Money market funds	$	283,322	$	283,322	$	—	$	—
Municipal bonds	1,851		—		1,851		—
Total	$	285,173	$	283,322	$	1,851	$	—

The municipal bond securities valued as Level 2 investments are primarily pre-refunded municipal bonds that are secured by escrow funds containing U.S. government securities. Our valuation techniques used to measure fair value for these securities during the period consisted primarily of third party pricing services that utilized actual market data such as trades of comparable bond issues, broker/dealer quotations for the same or similar investments in active markets and other observable inputs.

Fair Value of Other Financial Instruments

The carrying amounts of cash, cash equivalents, restricted cash, accounts receivable, deposits and accounts payable approximate their fair values due to the short-term maturities of these instruments.

As of June 30, 2017, the carrying value of our borrowings under our revolving credit facility approximates fair value and was classified as Level 2 in the fair value hierarchy. Please read Note 5, “Long-Term Debt,” for additional information.

5. Long-Term Debt

We have a revolving credit facility (the “Facility”) with borrowing capacity up to $200 million. The Facility may be increased to $250 million based on the terms and subject to the conditions set forth in the agreement relating to the Facility (the “Credit Agreement”). The Facility is available for working capital and general corporate purposes, including acquisitions, stock repurchases and issuances of letters of credit. Our obligations under the Facility are secured by 65% of the stock of our captive insurance subsidiary and are guaranteed by all of our domestic subsidiaries. At June 30, 2017, our outstanding balance on the Facility was $104.4 million, in addition we have an outstanding $1.0 million letter of credit issued under the Facility, providing us with an available borrowing capacity of $94.6 million.

The Facility matures on February 6, 2020. Borrowings under the Facility bear interest at an alternate base rate or LIBOR, at our option, plus an applicable margin. Depending on our leverage ratio, the applicable margin varies (i) in the case of LIBOR loans, from 2.00% to 2.75% and (ii) in the case of alternate base rate loans, from 0.00% to 0.75%. The alternate base rate is the highest of (i) the prime rate most recently published in The Wall Street Journal, (ii) the federal funds rate plus 0.50% and (iii) the 30-day LIBOR rate plus 2.00%. We also pay an unused commitment fee on the average daily unused portion of the Facility at a rate of 0.25%. The interest rate at June 30, 2017 was 2.78%. Interest expense and unused commitment fees are recorded in other income (expense).

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The Facility contains both affirmative and negative covenants that we believe are customary for arrangements of this nature. Covenants include, but are not limited to, limitations on our ability to incur additional indebtedness, sell material assets, retire, redeem or otherwise reacquire our capital stock, acquire the capital stock or assets of another business, make investments and pay dividends. In addition, the Credit Agreement requires us to comply with financial covenants limiting our total funded debt, minimum interest coverage ratio and maximum leverage ratio. We were in compliance with all financial covenants under the Credit Agreement at June 30, 2017.

6. Stockholders' Equity

During the first six months of 2017, we repurchased or withheld an aggregate of 325,903 shares of our common stock, as described below.

Repurchase Program

Our Board of Directors (the “Board”) has authorized a program to repurchase shares of our outstanding common stock (“Repurchase Program”). The purchases are to be made from time to time in the open market or directly from stockholders at prevailing market prices based on market conditions and other factors. During the six months ended June 30, 2017, 239,487 shares were repurchased under the Repurchase Program. As of June 30, 2017, we were authorized to repurchase an additional 896,782 shares under the Repurchase Program.

Withheld Shares

During the six months ended, June 30, 2017, we withheld 86,416 shares to satisfy tax withholding obligations for the vesting of restricted stock awards.

Dividends

The Board declared quarterly dividends as follows:

	2017		2016
	(amounts per share)
First quarter	$	0.25	$	0.22
Second quarter	0.30		0.25

 During the six months ended June 30, 2017 and 2016, we paid dividends totaling $11.6 million and $10.0 million, respectively.

7. Net Income per Share

We utilize the two-class method to compute net income per share. The two-class method allocates a portion of net income to participating securities, which include unvested awards of share-based payments with non-forfeitable rights to receive dividends. Net income allocated to unvested share-based payments is excluded from net income allocated to common shares. Any undistributed losses resulting from dividends exceeding net income are not allocated to participating securities. Basic net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options.

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The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017			2016			2017			2016
	(in thousands)
Net income	$	14,018		$	9,713		$	49,646		$	42,406
Less distributed and undistributed earnings allocated to participating securities	(248		)	(229		)	(909		)	(962		)
Net income allocated to common shares	$	13,770		$	9,484		$	48,737		$	41,444
Weighted average common shares outstanding	20,629			20,869			20,597			20,972
Incremental shares from assumed LTIP awards and conversions of common stock options	109			15			105			10
Adjusted weighted average common shares outstanding	20,738			20,884			20,702			20,982

8. Commitments and Contingencies

Worksite Employee 401(k) Retirement Plan Class Action Litigation

In December 2015, a class action lawsuit was filed against us and the third party discretionary trustee of the Insperity 401(k) retirement plan available to eligible worksite employees (the “Plan”) in the United States District Court for the Northern District of Georgia, Atlanta Division, on behalf of Plan participants. This suit generally alleges that Insperity’s third-party discretionary trustee of the Plan and Insperity breached their fiduciary duties to plan participants by selecting an Insperity subsidiary to serve as the recordkeeper for the Plan, by causing participants in the Plan to pay excessive recordkeeping fees to the Insperity subsidiary, by failing to monitor other fiduciaries and by making imprudent investment choices. We believe we have meritorious defenses, and we intend to vigorously defend this litigation. As a result of uncertainty regarding the outcome of this matter, no provision has been made in the accompanying consolidated financial statements.

We are a defendant in various other lawsuits and claims arising in the normal course of business. Management believes it has valid defenses in these cases and is defending them vigorously. While the results of litigation cannot be predicted with certainty, management believes the final outcome of such litigation will not have a material adverse effect on our financial position or results of operations.

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

You should read the following discussion in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016, as well as our Consolidated Financial Statements and notes thereto included in this quarterly report on Form 10-Q.

Recent Developments

In the second quarter of 2017, we received our designation as a Certified Professional Employer Organization (“CPEO”) from the United States Internal Revenue Service. This designation is a result of the enactment of the Small Business Efficiency Act, which creates a federal regulatory framework for the payment of wages to worksite employees and the reporting and remittance of payroll taxes on those wages paid by CPEOs under the statute. The certification provides additional regulatory certainty for CPEOs and their customers.

New Accounting Pronouncements

Please read Note 2 to the Consolidated Financial Statements, "Accounting Policies – New Accounting Pronouncements," for new accounting pronouncements information.

Results of Operations

Three Months Ended June 30, 2017 Compared to Three Months Ended June 30, 2016.

The following table presents certain information related to our results of operations:

	Three Months Ended   June 30,
	2017			2016			% Change
	(in thousands, except per share and statistical data)
Revenues (gross billings of $4.742 billion and $4.163 billion, less worksite employee payroll cost of $3.947 billion and $3.456 billion, respectively)	$	795,552		$	707,332		12.5	%
Gross profit	130,553			113,259			15.3	%
Operating expenses	107,615			97,236			10.7	%
Operating income	22,938			16,023			43.2	%
Other expense	(125		)	(357		)	(65.0	)%
Net income	14,018			9,713			44.3	%
Diluted net income per share of common stock	0.66			0.45			46.7	%
Adjusted net income(1)	17,277			12,864			34.3	%
Adjusted diluted net income per share of common stock(1)	0.82			0.60			36.7	%
Adjusted EBITDA(1)	33,324			25,576			30.3	%
Statistical Data:
Average number of worksite employees paid per month	180,276			163,521			10.2	%
Revenues per worksite employee per month(2)	$	1,471		$	1,442		2.0	%
Gross profit per worksite employee per month	241			231			4.3	%
Operating expenses per worksite employee per month	199			198			0.5	%
Operating income per worksite employee per month	42			33			27.3	%
Net income per worksite employee per month	26			20			30.0	%

 ____________________________________

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⁽¹⁾  Please read “Non-GAAP Financial Measures” for a reconciliation of the non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

⁽²⁾  Gross billings of $8,767 and $8,485 per worksite employee per month, less payroll cost of $7,296 and $7,043 per worksite employee per month, respectively.

Revenues

Our revenues for the second quarter of 2017increased12.5% over the 2016 period, primarily due to a 10.2%increase in the average number of worksite employees paid per month, and a 2.0%, or $29, increase in revenues per worksite employee per month.

We provide our PEO HR Outsourcing solutions to small and medium-sized businesses in strategically selected markets throughout the United States. Our revenue by region for our PEO HR Outsourcing solutions for the quarters ended June 30, 2017 and 2016 was as follows:

	Three Months Ended   June 30,						Three Months Ended   June 30,
	2017		2016		% Change		2017		2016
	(in thousands)						(% of total revenue)
Northeast	$	204,285	$	179,505	13.8	%	26.1	%	25.8	%
Southeast	92,049		76,270		20.7	%	11.8	%	11.0	%
Central	131,099		111,502		17.6	%	16.7	%	16.0	%
Southwest	185,094		166,523		11.2	%	23.6	%	24.0	%
West	170,452		160,932		5.9	%	21.8	%	23.2	%
	782,979		694,732		12.7	%	100.0	%	100.0	%
Other revenue(1)	12,573		12,600		(0.2	)%
Total revenue	$	795,552	$	707,332	12.5	%

_____________________________

⁽¹⁾ Comprised primarily of revenues generated by our other products and services offerings.

The percentage of total PEO HR Outsourcing solutions revenues in our significant markets include the following:

	Three Months Ended June 30,
	2017		2016
Texas	21.8	%	22.4	%
California	17.0	%	18.3	%
New York	9.5	%	9.3	%
Other	51.7	%	50.0	%
Total	100.0	%	100.0	%

Our growth in the number of worksite employees paid is affected by three primary sources: new client sales, client retention and the net change in existing clients through worksite employee new hires and layoffs. During the second quarter of 2017, we saw improvement in worksite employees paid from each of these sources as compared to the second quarter of 2016.

Gross Profit

Gross profit for the second quarter of 2017increased15.3% over the second quarter of 2016 to $130.6 million. The average gross profit per worksite employee increased4.3% to $241 per month in the 2017 period from $231 per month in the 2016 period.

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Our pricing objectives attempt to achieve a level of revenue per worksite employee that matches or exceeds changes in primary direct costs and operating expenses. Our revenues per worksite employee per month during the second quarter of 2017increased2.0% compared to the second quarter of 2016. Our direct costs, which primarily include payroll taxes, benefits and workers’ compensation expenses, increased1.6% to $1,230 per worksite employee per month in the second quarter of 2017 compared to $1,211 in the second quarter of 2016. The primary direct cost components changed as follows:

• Benefits costs – The cost of group health insurance and related employee benefits increased$8 per worksite employee per month, or 1.4% on a cost per covered employee basis, compared to the second quarter of 2016. Included in 2017 benefits costs is a reduction of $1.2 million, or $2 per worksite employee per month, for changes in estimated claims run-off related to prior periods. Included in 2016 benefits costs is a charge of $1.7 million, or $3 per worksite employee per month, for changes in estimated claim run-off related to prior periods. The percentage of worksite employees covered under our health insurance plans was 68.8% in the 2017 period compared to 69.0% in the 2016 period. Please read Note 2 to the Consolidated Financial Statements, “Accounting Policies – Health Insurance Costs,” for a discussion of our accounting for health insurance costs.

• Workers’ compensation costs – Workers’ compensation costs increased1.0%, but decreased $4 on a per worksite employee per month basis, compared to the second quarter of 2016. In the second quarter of 2017, as a result of closing out claims at lower than expected costs, we recorded reductions in workers’ compensation costs of $2.5 million, or 0.07% of non-bonus payroll costs, for changes in estimated losses related to prior reporting periods. As a percentage of non-bonus payroll cost, workers’ compensation costs were 0.58% in the 2017 period compared to 0.64% in the 2016 period. Please read Note 2 to the Consolidated Financial Statements, “Accounting Policies – Workers’ Compensation Costs,” for a discussion of our accounting for workers’ compensation costs.

• Payroll tax costs – Payroll taxes increased13.4% in part due to a 14.2%increase in payroll costs, or $14 per worksite employee per month, compared to the second quarter of 2016. Payroll taxes as a percentage of payroll costs were 7.0% in 2017 and 7.1% in 2016.

Operating Expenses

The following table presents certain information related to our operating expenses:

	Three Months Ended   June 30,						Three Months Ended   June 30,
	2017		2016		% Change		2017		2016		% Change
	(in thousands)						(per worksite employee per month)
Salaries, wages and payroll taxes	$	61,458	$	55,998	9.8	%	$	114	$	114	—
Stock-based compensation	5,303		4,761		11.4	%	10		10		—
Commissions	5,664		4,335		30.7	%	10		9		11.1	%
Advertising	6,175		6,712		(8.0	)%	11		14		(21.4	)%
General and administrative expenses	24,610		21,254		15.8	%	46		42		9.5	%
Depreciation and amortization	4,405		4,176		5.5	%	8		9		(11.1	)%
Total operating expenses	$	107,615	$	97,236	10.7	%	$	199	$	198	0.5	%

Operating expenses increased10.7% to $107.6 million compared to $97.2 million in the second quarter of 2016. Operating expenses per worksite employee per month increased to $199 in the 2017 period from $198 in the 2016 period. The components of operating expenses changed as follows:

• Salaries, wages and payroll taxes of corporate and sales staff increased$5.5 million or 9.8%, but remained flat on a per worksite employee per month basis, compared to the 2016 period. This increase was primarily due to a 7.4%increase in corporate headcount, including a 9.7% increase in the number of Business Performance Advisors.

• Stock-based compensation increased$0.5 million or 11.4%, but remained flat on a per worksite employee per month basis, compared to the 2016 period. This increase was primarily due to awards issued under our Long-Term Incentive Program.

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• Commissions expense increased$1.3 million or 30.7%, or $1 per worksite employee per month, compared to the 2016 period, primarily due to commissions associated with our PEO HR Outsourcing solutions.

• Advertising costs decreased$0.5 million or 8.0%, or $3 per worksite employee per month, compared to the 2016 period. The decrease was primarily due to decreased spending on sponsorships.

• General and administrative expenses increased$3.4 million or 15.8%, or $4 per worksite employee per month, compared to the 2016 period. The increase was primarily due to increased travel and training expenses, software maintenance costs and office expenses.

• Depreciation and amortization expense increased$0.2 million or 5.5%, but decreased $1 on a per worksite employee per month basis, compared to the 2016 period.

Income Tax Expense

Our effective income tax rate was 38.6% in the 2017 period compared to 38.0% in the 2016 period. Our provision for income taxes differed from the U.S. statutory rate of 35% primarily due to state income taxes and non-deductible expenses.

Operating and Net Income

Operating and net income per worksite employee per month was $42 and $26 in the 2017 period, respectively, versus $33 and $20 in the 2016 period, respectively.

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Six Months Ended June 30, 2017 Compared to Six Months Ended June 30, 2016.

The following table presents certain information related to our results of operations:

	Six Months Ended   June 30,
	2017			2016			% Change
	(in thousands, except per share and statistical data)
Revenues (gross billings of $9.758 billion and $8.727 billion, less worksite employee payroll cost of $8.080 billion and $7.217 billion, respectively)	$	1,678,216		$	1,509,740		11.2	%
Gross profit	289,899			263,275			10.1	%
Operating expenses	213,469			194,209			9.9	%
Operating income	76,430			69,066			10.7	%
Other expense	(283		)	(695		)	(59.3	)%
Net income	49,646			42,406			17.1	%
Diluted net income per share of common stock	2.35			1.98			18.7	%
Adjusted net income(1)	55,913			47,775			17.0	%
Adjusted diluted net income per share of common stock(1)	2.65			2.23			18.8	%
Adjusted EBITDA(1)	96,038			86,764			10.7	%
Statistical Data:
Average number of worksite employees paid per month	177,315			160,956			10.2	%
Revenues per worksite employee per month(2)	$	1,577		$	1,563		0.9	%
Gross profit per worksite employee per month	272			273			(0.4	)%
Operating expenses per worksite employee per month	201			201			—
Operating income per worksite employee per month	72			72			—
Net income per worksite employee per month	47			44			6.8	%

 ____________________________________

⁽¹⁾  Please read “Non-GAAP Financial Measures” for a reconciliation of the non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

⁽²⁾  Gross billings of $9,171 and $9,036 per worksite employee per month, less payroll cost of $7,594 and $7,473 per worksite employee per month, respectively.

Revenues

Our revenues for the six months ended June 30, 2017increased11.2% over the 2016 period, primarily due to a 10.2%increase in the average number of worksite employees paid per month and 0.9%, or $14, increase in revenues per worksite employee per month.

We provide our PEO HR Outsourcing solutions to small and medium-sized businesses in strategically selected markets throughout the United States. Our revenue by region for our PEO HR Outsourcing solutions for the six months ended June 30, 2017 and 2016 was as follows:

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	Six Months Ended   June 30,						Six Months Ended   June 30,
	2017		2016		% Change		2017		2016
	(in thousands)						(% of total revenue)
Northeast	$	440,385	$	388,160	13.5	%	26.7	%	26.1	%
Southeast	190,855		157,539		21.1	%	11.6	%	10.6	%
Central	273,876		238,508		14.8	%	16.6	%	16.1	%
Southwest	389,201		355,833		9.4	%	23.6	%	24.0	%
West	357,896		344,644		3.8	%	21.5	%	23.2	%
	1,652,213		1,484,684		11.3	%	100.0	%	100.0	%
Other revenue(1)	26,003		25,056		3.8	%
Total revenue	$	1,678,216	$	1,509,740	11.2	%

______________________________

⁽¹⁾ Comprised primarily of revenues generated by our other products and services offerings.

The percentage of total PEO HR Outsourcing solutions revenues in our significant markets include the following:

	Six Months Ended June 30,
	2017		2016
Texas	21.8	%	22.4	%
California	17.0	%	18.5	%
New York	9.9	%	9.7	%
Other	51.3	%	49.4	%
Total	100.0	%	100.0	%

Our growth in the number of worksite employees paid is affected by three primary sources: new client sales, client retention and the net change in existing clients through worksite employee new hires and layoffs. During the first six months of 2017, we saw improvement in worksite employees paid from new client sales and net change in existing clients as compared to the first six months of 2016, while client retention remained consistent with 2016.

Gross Profit

Gross profit for the first six months of 2017increased10.1% over the first six months of 2016 to $289.9 million. The average gross profit per worksite employee decreased0.4% to $272 per month in the 2017 period from $273 per month in the 2016 period.

Our pricing objectives attempt to achieve a level of revenue per worksite employee that matches or exceeds changes in primary direct costs and operating expenses. Our revenues per worksite employee per month during the first six months of 2017increased0.9% compared to the first six months of 2016. Our direct costs, which primarily include payroll taxes, benefits and workers’ compensation expenses, increased1.2% to $1,305 per worksite employee per month in the first six months of 2017 compared to $1,290 in the first six months of 2016. The primary direct cost components changed as follows:

• Benefits costs – The cost of group health insurance and related employee benefits increased$14 per worksite employee per month, or 2.8% on a cost per covered employee basis, compared to the first six months of 2016. Included in 2017 benefits costs is a charge of $0.5 million for changes in estimated claim run-off related to prior periods. Benefits costs incurred in the first six months of 2016 reflect reductions in estimated claims run-off related to prior periods of $3.7 million, or $4 per worksite employee per month. The percentage of worksite employees covered under our health insurance plans was 69.1% in the 2017 period compared to 69.6% in the 2016 period. Please read Note 2 to the Consolidated Financial Statements, “Accounting Policies – Health Insurance Costs,” for a discussion of our accounting for health insurance costs.

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• Workers’ compensation costs – Workers’ compensation costs decreased3.0%, or $5 per worksite employee per month, compared to the first six months of 2016. In the first six months of 2017, we recorded reductions in workers’ compensation costs of $8.0 million, or 0.11% of non-bonus payroll costs, for changes in estimated losses related to prior reporting periods. In the first six months of 2016, we recorded reductions in workers’ compensation costs of $2.6 million, or 0.04% of non-bonus payroll costs, for changes in estimated losses related to prior reporting periods. As a percentage of non-bonus payroll cost, workers’ compensation costs were 0.57% in the 2017 period compared to 0.66% in the 2016 period. Please read Note 2 to the Consolidated Financial Statements, “Accounting Policies – Workers’ Compensation Costs,” for a discussion of our accounting for workers’ compensation costs.

• Payroll tax costs – Payroll taxes increased11.2% due primarily to an 11.9%increase in payroll costs, or $5 on a per worksite employee per month basis, compared to the first six months of 2016. Payroll taxes as a percentage of payroll costs were 7.8% in 2017 and 7.9% in 2016.  

Operating Expenses

The following table presents certain information related to our operating expenses:

	Six Months Ended June 30,						Six Months Ended June 30,
	2017		2016		% Change		2017		2016		% Change
	(in thousands)						(per worksite employee per month)
Salaries, wages and payroll taxes	$	123,915	$	114,013	8.7	%	$	116	$	118	(1.7	)%
Stock-based compensation	9,806		8,336		17.6	%	9		9		—
Commissions	10,140		8,616		17.7	%	10		9		11.1	%
Advertising	10,147		9,759		4.0	%	10		10		—
General and administrative expenses	50,802		45,038		12.8	%	48		46		4.3	%
Depreciation and amortization	8,659		8,447		2.5	%	8		9		(11.1	)%
Total operating expenses	$	213,469	$	194,209	9.9	%	$	201	$	201	—

Operating expenses increased9.9% to $213.5 million in the first six months of 2017 compared to $194.2 million in the first six months of 2016. Operating expenses per worksite employee per month remained flat at $201 in the 2017 period compared to the 2016 period. The components of operating expenses changed as follows:

• Salaries, wages and payroll taxes of corporate and sales staff increased$9.9 million or 8.7%, but decreased$2 on a per worksite employee per month basis, compared to the 2016 period. This increase was primarily due to a 7.8% increase in corporate headcount, including a 10.4% increase in the number of Business Performance Advisors.

• Stock-based compensation increased$1.5 million or 17.6%, but remained flat on a per worksite employee per month basis, compared to the 2016 period. This increase was primarily due to awards issued under our Long-Term Incentive Program.

• Commissions expense increased$1.5 million or 17.7%, or $1 per worksite employee per month, compared to the 2016 period, primarily due to commissions associated with our PEO HR Outsourcing solutions.

• Advertising costs increased$0.4 million or 4.0%, but remained flat on a per worksite employee per month basis, compared to the 2016 period.

• General and administrative expenses increased$5.8 million or 12.8%, or $2 per worksite employee per month, compared to the 2016 period. The increase was primarily due to increased travel and training expenses, software maintenance costs and office expenses.

• Depreciation and amortization expense increased$0.2 million or 2.5%, but decreased$1 on a per worksite employee per month basis, compared to the 2016 period.

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Income Tax Expense

Our effective income tax rate was 34.8% in the 2017 period compared to 38.0% in the 2016 period. Our provision for income taxes differed from the U.S. statutory rate of 35% primarily due to state income taxes and non-deductible expenses. In addition, as a result of our 2016 adoption of Accounting Standards Update No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share Based Payment Accounting, during first quarter of 2017 and 2016, we recognized an income tax benefit of $3.3 million and $1.0 million, respectively, related to the vesting of restricted stock awards.

Operating and Net Income

Operating and net income per worksite employee per month was $72 and $47 in the 2017 period, respectively, versus $72 and $44 in the 2016 period, respectively.

Non-GAAP Financial Measures

Non-GAAP financial measures are not prepared in accordance with GAAP and may be different from non-GAAP financial measures used by other companies. Non-GAAP financial measures should not be considered as a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP. Investors are encouraged to review the reconciliation of the non-GAAP financial measures used to their most directly comparable GAAP financial measures as provided in the tables below.

Non-bonus payroll cost is a non-GAAP financial measure that excludes the impact of bonus payrolls paid to our worksite employees. Bonus payroll cost varies from period to period, but has no direct impact to our ultimate workers’ compensation costs under the current program. As a result, our management refers to non-bonus payroll cost in analyzing, reporting and forecasting our workers’ compensation costs. We include these non-GAAP financial measures because we believe they are useful to investors in allowing for greater transparency related to the costs incurred under our current workers’ compensation program.

Following is a GAAP to non-GAAP reconciliation of non-bonus payroll costs:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017		2016		% Change		2017		2016		% Change
	(in thousands, except per worksite employee per month data)
GAAP to non-GAAP reconciliation:
Payroll cost (GAAP)	$	3,946,005	$	3,455,077	14.2	%	$	8,078,997	$	7,217,142	11.9	%
Less: Bonus payroll cost	306,340		213,224		43.7	%	921,598		795,537		15.8	%
Non-bonus payroll cost	$	3,639,665	$	3,241,853	12.3	%	$	7,157,399	$	6,421,605	11.5	%
Payroll cost per worksite employee per month (GAAP)	$	7,296	$	7,043	3.6	%	$	7,594	$	7,473	1.6	%
Less: Bonus payroll cost per worksite employee per month	566		436		29.8	%	866		824		5.1	%
Non-bonus payroll cost per worksite employee per month	$	6,730	$	6,607	1.9	%	$	6,728	$	6,649	1.2	%

Adjusted cash, cash equivalents and marketable securities excludes funds associated with federal and state income tax withholdings, employment taxes and other payroll deductions, as well as client prepayments. We believe adjusted cash, cash equivalents and marketable securities is a useful measure of our available funds.

- 23 -

Following is a GAAP to non-GAAP reconciliation of cash, cash equivalents and marketable securities:

	June 30, 2017		December 31, 2016
	(in thousands)
Cash, cash equivalents and marketable securities (GAAP)	$	243,819	$	287,885
Less: Amounts payable for withheld federal and state income taxes, employment taxes and other payroll deductions	173,259		221,710
Customer prepayments	22,313		21,256
Adjusted cash, cash equivalents and marketable securities	$	48,247	$	44,919

EBITDA represents net income computed in accordance with GAAP, plus interest expense, income tax expense and depreciation and amortization expense. Adjusted EBITDA represents EBITDA plus non-cash impairment and other charges, non-cash stock-based compensation and stockholder advisory expenses. Our management believes EBITDA and adjusted EBITDA are often useful measures of our operating performance, as they allow for additional analysis of our operating results separate from the impact of these items.    

Following is a GAAP to non-GAAP reconciliation of EBITDA and adjusted EBITDA:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017		2016		% Change		2017			2016		% Change
	(in thousands, except per worksite employee per month data)
Net income (GAAP)	$	14,018	$	9,713	44.3	%	$	49,646		$	42,406	17.1	%
Income tax expense	8,795		5,953		47.7	%	26,501			25,965		2.1	%
Interest expense	803		650		23.5	%	1,426		—	1,287		10.8	%
Depreciation and amortization	4,405		4,176		5.5	%	8,659			8,447		2.5	%
EBITDA	28,021		20,492		36.7	%	86,232			78,105		10.4	%
Stock-based compensation	5,303		4,761		11.4	%	9,806			8,336		17.6	%
Stockholder advisory expenses	—		323		(100.0	)%	—			323		(100.0	)%
Adjusted EBITDA	$	33,324	$	25,576	30.3	%	$	96,038		$	86,764	10.7	%
Net income per worksite employee per month (GAAP)	$	26	$	20	30.0	%	$	47		$	44	6.8	%
Income tax expense per worksite employee per month	16		12		33.3	%	25			27		(7.4	)%
Interest expense per worksite employee per month	1		1		—		1			1		—
Depreciation and amortization per worksite employee per month	9		9		—		8			9		(11.1	)%
EBITDA per worksite employee per month	52		42		23.8	%	81			81		—
Stock-based compensation per worksite employee per month	10		9		11.1	%	9			8		12.5
Stockholder advisory expenses per worksite employee per month	—		1		(100.0	)%	—			1		(100.0	)%
Adjusted EBITDA per worksite employee per month	$	62	$	52	19.2	%	$	90		$	90	—

Adjusted net income and adjusted diluted net income per share of common stock represent net income and diluted net income per share computed in accordance with GAAP, excluding the impact of non-cash stock-based compensation in both periods. Our management believes adjusted net income and adjusted diluted net income per share of common stock are useful

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measures of our operating performance, as they allow for additional analysis of our operating results separate from the impact of these items.

Following is a GAAP to non-GAAP reconciliation of adjusted net income:

	Three Months Ended   June 30,								Six Months Ended   June 30,
	2017			2016			% Change		2017			2016			% Change
	(in thousands)
Net income (GAAP)	$	14,018		$	9,713		44.3	%	$	49,646		$	42,406		17.1	%
Non-GAAP adjustments:
Stock-based compensation	5,303			4,761			11.4	%	9,806			8,336			17.6	%
Stockholder advisory expenses	—			323			(100.0	)%	—			323			(100.0	)%
Total non-GAAP adjustments	5,303			5,084			4.3	%	9,806			8,659			13.2	%
Tax effect	(2,044		)	(1,933		)	5.7	%	(3,539		)	(3,290		)	7.6	%
Adjusted net income	$	17,277		$	12,864		34.3	%	$	55,913		$	47,775		17.0	%

Following is a GAAP to non-GAAP reconciliation of adjusted diluted net income per share of common stock:

	Three Months Ended   June 30,								Six Months Ended   June 30,
	2017			2016			% Change		2017			2016			% Change
	(in thousands)
Diluted net income per share of common stock (GAAP)	$	0.66		$	0.45		46.7	%	$	2.35		$	1.98		18.7	%
Non-GAAP adjustments:
Stock-based compensation	0.26			0.22			18.2	%	0.47			0.39			20.5	%
Stockholder advisory expenses	—			0.02			(100.0	)%	—			0.02			(100.0	)%
Total non-GAAP adjustments	0.26			0.24			8.3	%	0.47			0.41			14.6	%
Tax effect	(0.10		)	(0.09		)	11.1	%	(0.17		)	(0.16		)	6.3	%
Adjusted diluted net income per share of common stock	$	0.82		$	0.60		36.7	%	$	2.65		$	2.23		18.8	%

Liquidity and Capital Resources

We periodically evaluate our liquidity requirements, capital needs and availability of resources in view of, among other things, our expansion plans, stock repurchase, potential acquisitions, debt service requirements and other operating cash needs. To meet short-term liquidity requirements, which are primarily the payment of direct and operating expenses, we rely primarily on cash from operations. Longer-term projects, large stock repurchases or significant acquisitions may be financed with debt or equity. We have in the past sought, and may in the future seek, to raise additional capital or take other steps to increase or manage our liquidity and capital resources. We had $243.8 million in cash, cash equivalents and marketable securities at June 30, 2017, of which approximately $173.3 million was payable in early July2017 for withheld federal and state income taxes, employment taxes and other payroll deductions, and approximately $22.3 million were customer prepayments that were payable in July2017. At June 30, 2017, we had working capital of $55.7 million compared to $39.4 million at December 31, 2016. We currently believe that our cash on hand, marketable securities, cash flows from operations and availability under our revolving credit facility will be adequate to meet our liquidity requirements for the remainder of 2017. We intend to rely on these same sources, as well as public and private debt or equity financing, to meet our longer-term liquidity and capital needs.

We have a $200 million revolving credit facility (“Facility”) with a syndicate of financial institutions. The Facility is available for working capital and general corporate purposes, including acquisitions and stock repurchases. As of June 30, 2017, we had an outstanding letter of credit and borrowings totaling $105.4 million under the Facility. Please read Note 5 to the Consolidated Financial Statements, “Long-Term Debt,” for additional information.

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Cash Flows from Operating Activities

Net cash provided by operating activities in the first six months of 2017 was $13.0 million. Our primary source of cash from operations is the comprehensive service fee and payroll funding we collect from our clients. Our cash and cash equivalents, and thus our reported cash flows from operating activities are significantly impacted by various external and internal factors, which are reflected in part by the changes in our balance sheet accounts. These include the following:

• Timing of client payments / payroll levels – We typically collect our comprehensive service fee, along with the client’s payroll funding, from clients at least one day prior to the payment of worksite employee payrolls and associated payroll taxes. Therefore, the last business day of a reporting period has a substantial impact on our reporting of operating cash flows. For example, many worksite employees are paid on Fridays; therefore, operating cash flows decrease in the reporting periods that end on a Friday or a Monday. In the period ended June 30, 2017, the last business day of the reporting period was a Friday, client prepayments were $22.3 million and accrued worksite employee payroll was $228.6 million. In the period ended June 30, 2016, the last business day of the reporting period was a Thursday, client prepayments were $100.7 million and accrued worksite employee payroll was $277.4 million.

• Workers’ compensation plan funding – Under our workers’ compensation insurance arrangements, we make monthly payments to the carriers comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). These pre-determined amounts are stipulated in our agreements with the carriers, and are based primarily on anticipated worksite employee payroll levels and workers’ compensation loss rates during the policy year. Changes in payroll levels from those that were anticipated in the arrangements can result in changes in the amount of cash payments, which will impact our reporting of operating cash flows. Our claim funds paid, based upon anticipated worksite employee payroll levels and workers’ compensation loss rates, were $32.7 million in the first six months of 2017 and $29.5 million in the first six months of 2016. However, our estimate of workers’ compensation incurred claims was $32.2 million in the 2017 period and $33.8 million in the 2016 period.

• Medical plan funding – Our health care contract with United establishes participant cash funding rates 90 days in advance of the beginning of a reporting quarter. Therefore, changes in the participation level of the United plan have a direct impact on our operating cash flows. In addition, changes to the funding rates, which are solely determined by United based primarily upon recent claim history and anticipated cost trends, also have a significant impact on our operating cash flows. As of June 30, 2017, premiums owed and cash funded to United have exceeded the costs of the United plan, resulting in a $22.6 million surplus, $13.6 million of which is reflected as a current asset, and $9.0 million of which is reflected as a long-term asset on our Consolidated Balance Sheets. The premiums, including additional quarterly premium, owed to United at June 30, 2017, were $22.4 million, which is included in accrued health insurance costs, a current liability, on our Consolidated Balance Sheets.

• Operating results – Our adjusted net income has a significant impact on our operating cash flows. Our adjusted net income increased17.0% to $55.9 million in the six months ended June 30, 2017, compared to $47.8 million in the six months ended June 30, 2016, due to higher gross profit. Please read “Results of Operations – Six Months Ended June 30, 2017 Compared to Six Months Ended June 30, 2016.”

Cash Flows from Investing Activities

Net cash flows used in investing activities were $20.9 million for the six months ended June 30, 2017, primarily due to property and equipment purchases.

Cash Flows from Financing Activities

Net cash flows used in financing activities were $36.3 million for the six months ended June 30, 2017. We repurchased $25.5 million in stock and paid $11.6 million in dividends during the six months ended June 30, 2017.

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

We are primarily exposed to market risks from fluctuations in interest rates and the effects of those fluctuations on the market values of our cash equivalent short-term investments, our available-for-sale marketable securities and our borrowings under our Facility, which bears interest at a variable market rate. As of June 30, 2017, we had outstanding letters of credit and borrowings totaling $105.4 million under the Facility. Please read Note 5 to the Consolidated Financial Statements, “Long-Term Debt” for additional information.

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 The cash equivalent short-term investments consist primarily of overnight investments, which are not significantly exposed to interest rate risk, except to the extent that changes in interest rates will ultimately affect the amount of interest income earned on these investments. Our available-for-sale marketable securities are subject to interest rate risk because these securities generally include a fixed interest rate. As a result, the market values of these securities are affected by changes in prevailing interest rates.

We attempt to limit our exposure to interest rate risk primarily through diversification and low investment turnover. Our investment policy is designed to maximize after-tax interest income while preserving our principal investment. As a result, our marketable securities consist of tax-exempt short term and intermediate term debt securities, which are primarily pre-funded municipal bonds that are secured by escrow funds containing U.S. Government Securities.

ITEM 4.  CONTROLS AND PROCEDURES.

In accordance with Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), we carried out an evaluation, under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of June 30, 2017.

There has been no change in our internal controls over financial reporting that occurred during the three months ended June 30, 2017 that has materially affected, or is reasonably likely to materially affect, our internal controls over financial reporting.

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PART II

ITEM 1.  LEGAL PROCEEDINGS.

Please read Note 8 to the Consolidated Financial Statements, “Commitments and Contingencies,” which is incorporated herein by reference.

ITEM 1A.  RISK FACTORS.

Forward-Looking Statements

The statements contained herein that are not historical facts are forward-looking statements within the meaning of the federal securities laws (Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act). You can identify such forward-looking statements by the words “expects,” “intends,” “plans,” “projects,” “believes,” “estimates,” “likely,” “possibly,” “probably,” “goal,” “opportunity,” “objective,” “target,” “assume,” “outlook,” “guidance,” “predicts,” “appears,” “indicator” and similar expressions. Forward-looking statements involve a number of risks and uncertainties. In the normal course of business, Insperity, Inc., in an effort to help keep our stockholders and the public informed about our operations, may from time to time issue such forward-looking statements, either orally or in writing. Generally, these statements relate to business plans or strategies, projected or anticipated benefits or other consequences of such plans or strategies, or projections involving anticipated revenues, earnings, unit growth, profit per worksite employee, pricing, operating expenses or other aspects of operating results. We base the forward-looking statements on our expectations, estimates and projections at the time such statements are made. These statements are not guarantees of future performance and involve risks and uncertainties that we cannot predict. In addition, we have based many of these forward-looking statements on assumptions about future events that may prove to be inaccurate. Therefore, the actual results of the future events described in such forward-looking statements could differ materially from those stated in such forward-looking statements. Among the factors that could cause actual results to differ materially are: (i) adverse economic conditions; (ii) regulatory and tax developments and possible adverse application of various federal, state and local regulations; (iii) the ability to secure competitive replacement contracts for health insurance and workers’ compensation insurance at expiration of current contracts; (iv) cancellation of client contracts on short notice, or the inability to renew client contracts or attract new clients; (v) vulnerability to regional economic factors because of our geographic market concentration; (vi) increases in health insurance costs and workers’ compensation rates and underlying claims trends, health care reform, financial solvency of workers’ compensation carriers, other insurers or financial institutions, state unemployment tax rates, liabilities for employee and client actions or payroll-related claims; (vii) failure to manage growth of our operations and the effectiveness of our sales and marketing efforts; (viii) the impact of the competitive environment in the PEO industry on our growth and/or profitability; (ix) our liability for worksite employee payroll, payroll taxes and benefits costs; (x) our liability for disclosure of sensitive or private information; (xi) our ability to integrate or realize expected returns on our acquisitions; (xii) failure of our information technology systems; (xiii) an adverse final judgment or settlement of claims against Insperity; and (xiv) disruptions to our business resulting from the actions of certain stockholders. These factors are discussed in further detail in our 2016 Annual Report on Form 10-K under “Item 1A. Risk Factors” in Part I and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, and elsewhere in this report. Any of these factors, or a combination of such factors, could materially affect the results of our operations and whether forward-looking statements we make ultimately prove to be accurate.

Except to the extent otherwise required by federal securities law, we do not undertake any obligation to update our forward-looking statements to reflect events or circumstances after the date they are made or to reflect the occurrence of unanticipated events.

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ITEM 2.  UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

The following table provides information about purchases by Insperity during the three months ended June 30, 2017, of equity securities that are registered by Insperity pursuant to Section 12 of the Exchange Act:

Period	Total Number of Shares Purchased(1)(2)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Announced Programs(2)	Maximum Number of Shares Available for Purchase under Announced Program(2)
04/01/2017 – 04/30/2017	—	$	—	—	1,107,788
05/01/2017 – 05/31/2017	100,335	80.12		100,006	1,007,782
06/01/2017 – 06/30/2017	111,000	73.62		111,000	896,782
Total	211,335	$	76.70	211,006

 ____________________________________

⁽¹⁾  During the three months ended June 30, 2017, 329 shares of restricted stock were withheld to satisfy tax-withholding obligations arising in conjunction with the vesting of restricted stock. The required withholding is calculated using the closing sales price reported by the New York Stock Exchange on the date prior to the applicable vesting date. These shares are not subject to the repurchase program described above.

⁽²⁾  Our Board of Directors (the “Board”) has approved a program to repurchase shares of our outstanding common stock. During the three months ended June 30, 2017, 211,006 shares were repurchased under the program. As of June 30, 2017, we were authorized to repurchase an additional 896,782 shares under the program. Unless terminated earlier by resolution of the Board, the repurchase program will expire when we have repurchased all shares authorized for repurchase under the repurchase program.

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ITEM 6.  EXHIBITS.

(a) List of Exhibits

10.1	†	Insperity, Inc. 2012 Incentive Plan, as amended and restated (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on June 21, 2017).
10.2	†*	Insperity, Inc. Directors Compensation Plan
31.1	*	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	*	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	**	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	**	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	*	XBRL Instance Document.(1)
101.SCH	*	XBRL Taxonomy Extension Schema Document.
101.CAL	*	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	*	XBRL Extension Definition Linkbase Document.
101.LAB	*	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	*	XBRL Taxonomy Extension Presentation Linkbase Document.

____________________________________
†	Management contract or compensatory plan or arrangement
*	Filed with this report.
**	Furnished with this report.

⁽¹⁾  Attached as exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Statements of Operations for the three and six month periods ended June 30, 2017 and 2016; (ii) the Consolidated Balance Sheets at June 30, 2017 and December 31, 2016; (iii) the Consolidated Statement of Stockholders’ Equity for the six month period ended June 30, 2017; (iv) the Consolidated Statements of Cash Flows for the six month periods ended June 30, 2017 and 2016; and (v) Notes to the Consolidated Financial Statements.

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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.

	Insperity, Inc.
Date: August 1, 2017	By:	/s/ Douglas S. Sharp
		Douglas S. Sharp
		Senior Vice President of Finance,
		Chief Financial Officer and Treasurer
		(Principal Financial Officer)

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EX-10.2

Exhibit 10.2

INSPERITY, INC.

DIRECTORS COMPENSATION PLAN

(Amended and Restated as of April 1, 2017)

INSPERITY, INC.

DIRECTORS COMPENSATION PLAN

Table of Contents

	Page
SECTION 1.	DEFINITIONS	1
SECTION 2.	ADMINISTRATION	4
SECTION 3.	PARTICIPANTS	4
SECTION 4.	BENEFITS	4
SECTION 5.	GENERAL PROVISIONS	8

i

INSPERITY, INC.

DIRECTORS COMPENSATION PLAN

PREAMBLE

WHEREAS, Insperity, Inc. (the “Company”) previously adopted the Insperity, Inc. Directors Compensation Plan (the “Plan”) in order to promote the interests of the Company by encouraging Directors (as defined below) to acquire or increase their equity interests in the Company and to provide a means whereby such persons may develop a sense of proprietorship and personal involvement in the development and financial success of the Company; and

WHEREAS, effective August 15, 2012, the Company amended and restated the Plan in its entirety; and

WHEREAS, effective January 1, 2015, the Company amended the Plan; and

WHEREAS, effective October 1, 2015, the Company amended the Plan; and

WHEREAS, the Company desires to amend and restate the Plan in its entirety.

NOW, THEREFORE, the Company hereby amends and restates the Plan as set forth herein, effective as of April 1, 2017.

SECTION 1.

DEFINITIONS

For purposes of the Plan, the following terms shall have the meanings indicated:

1.1Annual Director Award Date means for each calendar year in which this Plan is in effect, the date on which the annual meeting of the stockholders of the Company is held in that year.

1.2Applicable Date means for the annual Board retainer, committee membership retainers and annual committee chair fees, the last day of the quarter.

1

1.3Award Agreement means Award Agreement as such term is defined under the Insperity, Inc. 2012 Incentive Plan.

1.4Board means the Board of Directors of the Company.

1.5Cause means:

(a) the Director whose removal is proposed has been convicted, or when a Director is granted immunity to testify when another has been convicted, of a felony by a court of competent jurisdiction and such conviction is no longer subject to direct appeal;

(b) such Director has been found by the affirmative vote of a majority of the entire Board at any regular or special meeting of the Board called for that purpose or by a court of competent jurisdiction to have been guilty of willful misconduct in the performance of his or her duties to the Company in a matter of substantial importance to the Company; or

(c) such Director has been adjudicated by a court of competent jurisdiction to be mentally incompetent, which mental incompetency directly affects his or her ability as a Director of the Company.

1.6Committee means the Compensation Committee of the Board or any other committee as may be designated by the Board.

1.7Common Stock means Common Stock as such term is defined under the Insperity, Inc. 2012 Incentive Plan.

1.8Compensation means the Participant’s annual Board retainer, committee membership retainers and any retainers and fees earned by the Participant for chairing committees

2

during the applicable calendar year, as set forth in Appendix A, which may be amended from time to time by the Board.

1.9Director means a member of the Board, excluding any individual who is also an employee of the Company or a subsidiary thereof.

1.10Disability means the inability to perform the duties of the Director’s position for a period of six (6) consecutive months or for an aggregate of six (6) months during any twelve (12) month period after the Grant Date by reason of any medically determinable physical or mental impairment, as determined by the Board in the Board’s sole discretion.

1.11Reserved.

1.12Fair Market Value means, as applied to a specific date, Fair Market Value as such term is defined under the Insperity, Inc. 2012 Incentive Plan.

1.13Grant Date means the automatic date of grant of an award under the Plan as provided for in Section 4.

1.14Insperity, Inc. 2012 Incentive Plan or 2012 Incentive Plan means the Insperity, Inc. 2012 Incentive Plan, effective May 16, 2012, and as amended from time to time.

1.15Option means an Option as such term is defined under the Insperity, Inc. 2012 Incentive Plan.

1.16Participant means each Director, excluding any Director who elects in writing not to participate in the Plan.

1.17Stock Award means a Stock Award as such term is defined under the Insperity, Inc. 2012 Incentive Plan.

1.18Treasury Stock means issued shares of Company Stock that are held by the Company.

3

SECTION 2.

ADMINISTRATION

2.1    Administration. The Plan shall be administered by the Board. The Board shall have the complete authority and power to interpret the Plan, prescribe, amend and rescind rules relating to its administration, determine a Participant’s right to a payment and the amount of such payment, and to take all other actions necessary or desirable for the administration of the Plan. In the event the Board determines that the number of actual meetings for the Board or a committee exceeds three (3) times the number of regularly scheduled meetings during a calendar year, the Board may provide for an adjustment to the Compensation paid for the corresponding retainer to compensate Directors for the additional attended meetings. All actions and decisions of the Board shall be final and binding upon all persons.

2.2    Capitalized Terms. To the extent not defined in this Plan, capitalized terms shall have the meanings assigned thereto in the 2012 Incentive Plan.

SECTION 3.

PARTICIPANTS

3.1    Participants. Each Director shall be eligible to be a Participant.

SECTION 4.

BENEFITS

4.1    Retainer, Meeting and Committee Chair Fees. The Compensation of Directors is set forth in Appendix A. The Compensation for annual retainers and annual committee chair fees, if any, shall be paid to each Director on a quarterly basis, with each installment being equal to one-

4

fourth of the annualized amount set forth in Appendix A and being paid as soon as administratively feasible following the end of the quarter. Annually, each Director may elect, prior to the date that the Compensation would otherwise be first payable to such Director in cash, to receive all such Compensation in shares of Company Stock. The number of shares of Company Stock to be paid to an electing Director shall be determined by dividing the Director’s Compensation to be paid on such date by the Fair Market Value of the Company Stock on the Applicable Date, with any fractional share paid in cash. Notwithstanding the foregoing, however, payment in shares of Company Stock may only be made by the Company with shares of Treasury Stock. In the event the number of shares of Treasury Stock is insufficient on any date to make all such payments provided for in this Section 4.1 in full, then all Directors who are entitled to receive shares of Company Stock on such date shall share ratably in the number of shares available and the balance of each such Director’s Compensation shall be paid in cash. An individual Director’s ratable share shall be calculated by dividing such Director’s eligible Compensation applicable to such payment by the total of all electing Directors’ eligible Compensation applicable to such payment. An election to receive payment of Compensation in Company Stock rather than in cash shall be made in such manner as the Committee may from time to time prescribe.

4.2    Equity Award Grants. Directors shall be granted equity awards in accordance with the terms provided below and subject to applicable terms and limitations set forth in the Company’s 2012 Incentive Plan and the applicable Award Agreements. Notwithstanding anything herein to the contrary, if the number of shares of Common Stock available for equity awards under the 2012 Incentive Plan is insufficient to make all grants of the awards provided for below on the applicable grant date, then all Directors who are entitled to an award on such date shall share ratably in the

5

number of shares then available for awards under the 2012 Incentive Plan, and Directors shall have no right to receive an award with respect to the deficiencies in the number of available shares.

4.3    Reserved.

4.4    Annual Director Award.

a. On the Annual Director Award Date, each Director who is in office immediately after the annual meeting on such date shall be granted a Stock Award of a number of shares of Common Stock with an aggregate Fair Market Value as set forth in Appendix A, determined as of the date prior to the Grant Date. The Annual Director Awards shall be 100% vested and exercisable and shall be rounded up to the next higher whole share amount in the case of a fractional share amount. No Annual Director Award will be made to an individual Director if such Director gives advance written notice to the Board that he or she does not wish to receive such award.

b. A Director who is appointed to the Board for the first time after April 1, 2017, shall be automatically granted, on the date of his or her appointment to the Board, a Stock Award of a number of shares of Common Stock with an aggregate Fair Market Value equal to the Annual Director Award as set forth in Appendix A, determined as of the date prior to the Grant Date, but such Award shall be pro-rated based on the date of the last annual meeting, rounded to the nearest month (“Initial Annual Director Award”). The Initial Annual Director Award shall be 100% vested and exercisable and shall be rounded up to the next higher whole share amount in the case of a fractional share amount.

6

c. Notwithstanding the foregoing, a Director whose initial service on the Board begins as a result of being elected or appointed to the Board at the annual meeting shall receive the Annual Director Award, but not an Initial Annual Director Award.

4.5    Termination of Director Options. Any Option previously granted to a Director shall terminate and be of no force and effect with respect to any shares of Common Stock not previously purchased by the Director upon the first to occur of:

(i)    the tenth (10th) anniversary of the Grant Date for such award; or

(ii)    the expiration of (A) three months following the Director’s termination of service for Cause; or (B) three years following the Director’s termination of service for any other reason.

Notwithstanding anything herein to the contrary, the normal expiration date for Options shall not be extended.

4.6    Forfeiture of Director Stock Awards. Any portion of a Stock Award to a Director which has not become vested on or before the date of the Director’s termination of service shall be forfeited.

4.7    Award Agreement. Each Option and Stock Award that is not 100% vested, granted to a Director shall be evidenced by an Award Agreement between the Company and such Director that sets forth the terms, conditions and limitations described in this Plan, if any, the 2012 Incentive Plan and any additional terms, conditions and limitations applicable to the Option or the Stock Award.

4.8    Pro-Ration of Compensation. In the event a Director is elected or appointed to the Board at any time during the year, or if a Director becomes a committee member or committee chair during the calendar year, the annual Board and committee retainer and annual committee chair fee

7

shall be paid pro-rata based on service for the calendar year quarter, rounded to the nearest month based on the date of election or appointment. In the event a Director resigns from the Board, a committee or as committee chair, compensation for the respective retainer or fee will be similarly paid pro-rata based on service for the calendar year quarter.

SECTION 5.

GENERAL PROVISIONS

5.1    Amendment and Termination. The Board may from time to time amend, suspend or terminate the Plan, in whole or in part; provided, however, no amendment, suspension or termination of the Plan may impair the right of a Participant to receive any benefit accrued hereunder prior to the effective date of such amendment, suspension or termination. Notwithstanding the preceding sentence, equity awards under the Plan will cease without any action of the Committee or Board if the 2012 Incentive Plan expires and the Board does not designate a successor plan under which the equity awards are to be made.

5.2    Compliance with Securities Laws. It is the intention of the Company that, so long as any of the Company’s equity securities are registered pursuant to Section 12(b) or 12(g) of the Securities Exchange Act of 1934, as amended, this Plan shall be operated in compliance with Section 16(b) thereof.

5.3    Applicable Law. Except to the extent preempted by applicable federal law, the Plan shall be construed and governed in accordance with the laws of the State of Delaware.

8

APPENDIX A

Insperity, Inc. Directors Compensation Plan

(Amended and Restated as of April 1, 2017)

Directors' Compensation & Equity Awards

	Board	Compensation Committee	FRMA Committee	N&CG Committee	Lead Independent Director
Annual Retainer	$61,000	$10,000	$15,000	$5,000	$20,000
Annual Committee Chair Fees	N/A	$15,000	$25,000	$10,000	N/A
Annual Director Award	$105,000	N/A	N/A	N/A	N/A

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Paul J. Sarvadi, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Insperity, 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

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

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

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

Date: August 1, 2017
	/s/ Paul J. Sarvadi
	Paul J. Sarvadi
	Chairman of the Board and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Douglas S. Sharp, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Insperity, 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

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

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

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

Date: August 1, 2017
	/s/ Douglas S. Sharp
	Douglas S. Sharp
	Senior Vice President of Finance, Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Insperity, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2017, (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Paul J. Sarvadi, Chairman of the Board and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

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

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

/s/ Paul J. Sarvadi

Paul J. Sarvadi

Chairman of the Board and Chief Executive Officer

August 1, 2017

EX-32.2

 Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Insperity, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2017, (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Douglas S. Sharp, Senior Vice President of Finance, Chief Financial Officer and Treasurer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

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

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

/s/ Douglas S. Sharp

Douglas S. Sharp

Senior Vice President of Finance,

Chief Financial Officer and Treasurer

August 1, 2017

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Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 25, 2017
Entity Information [Line Items]
Entity Registrant Name	INSPERITY, INC.
Entity Central Index Key	0001000753
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		20,846,440
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 241,890	$ 286,034
Restricted cash	41,703	42,637
Marketable securities	1,929	1,851
Accounts receivable, net:
Trade	2,775	13,107
Unbilled	255,184	254,999
Other	3,610	2,178
Prepaid insurance	27,070	15,041
Other current assets	17,993	19,526
Income taxes receivable	6,878	4,949
Total current assets	599,032	640,322
Property and equipment:
Land	6,215	5,214
Buildings and improvements	94,318	90,151
Computer hardware and software	101,003	97,311
Software development costs	56,584	51,956
Furniture, fixtures and other	41,826	38,483
Total property and equipment, gross	299,946	283,115
Accumulated depreciation and amortization	(207,288)	(202,854)
Total property and equipment, net	92,658	80,261
Other assets:
Prepaid health insurance	9,000	9,000
Deposits – health insurance	5,300	4,700
Deposits – workers’ compensation	157,850	143,938
Goodwill and other intangible assets, net	12,838	13,088
Deferred income taxes, net	5,560	14,025
Other assets	3,650	1,840
Total other assets	194,198	186,591
Total assets	885,888	907,174
Current liabilities:
Accounts payable	3,132	4,189
Payroll taxes and other payroll deductions payable	189,940	247,766
Accrued worksite employee payroll cost	228,556	215,214
Accrued health insurance costs	26,579	26,360
Accrued workers’ compensation costs	43,939	44,231
Accrued corporate payroll and commissions	28,566	40,761
Other accrued liabilities	22,658	22,437
Total current liabilities	543,370	600,958
Noncurrent liabilities:
Accrued workers’ compensation costs	154,415	141,291
Long-term debt	104,400	104,400
Total noncurrent liabilities	258,815	245,691
Commitments and contingencies
Stockholders’ equity:
Common stock	277	277
Additional paid-in capital	15,462	9,240
Treasury stock, at cost	(248,266)	(227,152)
Retained earnings	316,230	278,160
Total stockholders’ equity	83,703	60,525
Total liabilities and stockholders’ equity	$ 885,888	$ 907,174

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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues (gross billings of $4.742 billion, $4.163 billion, $9.758 billion and $8.727 billion less worksite employee payroll cost of $3.947 billion, $3.456 billion, $8.080 billion and $7.217 billion, respectively)	$ 795,552	$ 707,332	$ 1,678,216	$ 1,509,740
Direct costs:
Payroll taxes, benefits and workers’ compensation costs	664,999	594,073	1,388,317	1,246,465
Gross profit	130,553	113,259	289,899	263,275
Operating expenses:
Salaries, wages and payroll taxes	61,458	55,998	123,915	114,013
Stock-based compensation	5,303	4,761	9,806	8,336
Commissions	5,664	4,335	10,140	8,616
Advertising	6,175	6,712	10,147	9,759
General and administrative expenses	24,610	21,254	50,802	45,038
Depreciation and amortization	4,405	4,176	8,659	8,447
Total operating expenses	107,615	97,236	213,469	194,209
Operating income	22,938	16,023	76,430	69,066
Other income (expense):
Interest income	678	293	1,143	592
Interest expense	(803)	(650)	(1,426)	(1,287)
Income before income tax expense	22,813	15,666	76,147	68,371
Income tax expense	8,795	5,953	26,501	25,965
Net income	14,018	9,713	49,646	42,406
Less distributed and undistributed earnings allocated to participating securities	248	229	909	962
Net income allocated to common shares	$ 13,770	$ 9,484	$ 48,737	$ 41,444
Basic net income per share of common stock (in dollars per share)	$ 0.67	$ 0.45	$ 2.37	$ 1.98
Diluted net income per share of common stock (in dollars per share)	$ 0.66	$ 0.45	$ 2.35	$ 1.98

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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Gross billings	$ 4,742	$ 4,163	$ 9,758	$ 8,727
Worksite employee payroll costs	$ 3,947	$ 3,456	$ 8,080	$ 7,217

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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - 6 months ended Jun. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2016	$ 60,525	$ 277	$ 9,240	$ (227,152)	$ 278,160
Purchase of treasury stock, at cost	(25,528)	0	0	(25,528)	0
Stock-based compensation expense	9,806	0	5,746	4,060	0
Other	833	0	476	354	3
Dividends paid	(11,579)	0	0	0	(11,579)
Net income	49,646	0	0	0	49,646
Balance at Jun. 30, 2017	$ 83,703	$ 277	$ 15,462	$ (248,266)	$ 316,230
Balance (shares) at Dec. 31, 2016		27,744
Balance (shares) at Jun. 30, 2017		27,744

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 49,646	$ 42,406
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,659	8,447
Stock-based compensation	9,806	8,336
Deferred income taxes	8,465	9,414
Changes in operating assets and liabilities:
Restricted cash	934	(3,808)
Accounts receivable	8,715	(44,347)
Prepaid insurance	(12,029)	(19,128)
Other current assets	1,533	(1,419)
Other assets	(16,287)	4,156
Accounts payable	(1,057)	(1,835)
Payroll taxes and other payroll deductions payable	(57,826)	(64,180)
Accrued worksite employee payroll expense	13,342	115,459
Accrued health insurance costs	219	13,277
Accrued workers’ compensation costs	12,832	15,176
Accrued corporate payroll, commissions and other accrued liabilities	(11,974)	(11,627)
Income taxes payable/receivable	(1,929)	(9,661)
Total adjustments	(36,597)	18,260
Net cash provided by operating activities	13,049	60,666
Marketable securities:
Purchases	(919)	(310)
Proceeds from dispositions	0	7,268
Proceeds from maturities	805	990
Property and equipment:
Purchases	(20,802)	(12,647)
Net cash used in investing activities	(20,916)	(4,699)
Cash flows from financing activities:
Purchase of treasury stock	(25,528)	(4,790)
Repurchase of common stock	0	(144,263)
Dividends paid	(11,579)	(9,997)
Borrowings under long-term debt agreement	0	124,400
Principal repayments	0	(20,000)
Other	830	718
Net cash used in financing activities	(36,277)	(53,932)
Net increase (decrease) in cash and cash equivalents	(44,144)	2,035
Cash and cash equivalents at beginning of period	286,034	269,538
Cash and cash equivalents at end of period	$ 241,890	$ 271,573

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Basis of Presentation (Notes)

6 Months Ended

Jun. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

1. Basis of Presentation

Insperity, Inc., a Delaware corporation (“Insperity,” “we,” “our,” and “us”), provides an array of human resources (“HR”) and business solutions designed to help improve business performance. Our most comprehensive HR services offerings are provided through our professional employer organization (“PEO”) services, known as Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of HR functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management, and training and development services, along with our cloud-based human capital management platform, the Employee Service Center^TM.

In addition to our PEO HR Outsourcing solutions, we offer a number of other business performance solutions, including Human Capital Consulting, Payroll & Human Capital Management, Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Financial and Expense Management Services, Retirement Services and Insurance Services, a number of which are offered via desktop applications and cloud-based delivery models. These other products and services are offered separately, along with our PEO HR Outsourcing solutions or as a bundle, such as our new Workforce Administration^TM solution that provides a comprehensive human capital management and payroll services solution.

The Consolidated Financial Statements include the accounts of Insperity and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes.  Actual results could differ from those estimates.

The accompanying Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements at and for the year ended December 31, 2016. Our Consolidated Balance Sheet at December 31, 2016 has been derived from the audited financial statements at that date, but does not include all of the information or footnotes required by GAAP for complete financial statements.  Our Consolidated Balance Sheet at June 30, 2017 and our Consolidated Statements of Operations for the three and six month periods ended June 30, 2017 and 2016, our Consolidated Statements of Cash Flows for the six month periods ended June 30, 2017 and 2016, and our Consolidated Statement of Stockholders’ Equity for the six month period ended June 30, 2017, have been prepared by us without audit. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary to present fairly the consolidated financial position, results of operations and cash flows, have been made. Certain prior year amounts have been reclassified to conform to the 2017 presentation.

The results of operations for the interim periods are not necessarily indicative of the operating results for a full year or of future operations.

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Accounting Policies (Notes)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Accounting Policies

2. Accounting Policies

Health Insurance Costs

We provide group health insurance coverage to our worksite employees in our PEO HR Outsourcing solutions through a national network of carriers, including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield, and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the costs of the United plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense in our Consolidated Statements of Operations. The estimated incurred claims are based upon: (i) the level of claims processed during the quarter; (ii) estimated completion rates based upon recent claim development patterns under the plan; and (iii) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $5.1 million as of June 30, 2017, and is reported as a long-term asset. As of June 30, 2017, Plan Costs were less than the net premiums paid and owed to United by $22.6 million. As this amount is in excess of the agreed-upon $9.0 million surplus maintenance level, the $13.6 million difference is included in prepaid insurance, a current asset, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at June 30, 2017 were $22.4 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred in the first six months of 2017 included costs of $0.5 million for changes in estimated run-off related to prior periods.

Workers’ Compensation Costs

Our workers’ compensation coverage for our worksite employees in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $5 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We employ a third party actuary to estimate our loss development rate, which is primarily based upon the nature of worksite employees’ job responsibilities, the location of worksite employees, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the six months ended June 30,2017 and 2016, we reduced accrued workers’ compensation costs by $8.0 million and $2.6 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate utilized in the 2017 period was 1.5% and in the 2016 period was 1.0%) and are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Six Months Ended   June 30,
	2017			2016
	(in thousands)
Beginning balance, January 1,	$	183,928		$	162,184
Accrued claims	34,242			35,045
Present value discount	(2,008		)	(1,274		)
Paid claims	(20,044		)	(19,038		)
Ending balance	$	196,118		$	176,917
Current portion of accrued claims	$	41,703		$	41,236
Long-term portion of accrued claims	154,415			135,681
	$	196,118		$	176,917

The current portion of accrued workers’ compensation costs on our Consolidated Balance Sheets at June 30, 2017 includes $2.2 million of workers’ compensation administrative fees.

As of June 30, 2017 and 2016, the undiscounted accrued workers’ compensation costs were $207.2 million and $187.0 million, respectively.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated worksite employee payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits - workers’ compensation, a long-term asset in our Consolidated Balance Sheets. As of June 30, 2017, we had restricted cash of $41.7 million and deposits - workers’ compensation of $157.9 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in long-term liabilities on our Consolidated Balance Sheets.

New Accounting Pronouncements

We believe we have implemented the accounting pronouncements with a material impact on our financial statements and do not believe there are any new or pending pronouncements that will materially impact our financial position or results of operations, other than discussed below.

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 is effective for annual reporting periods beginning after December 15, 2017, and early adoption is permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt ASU No. 2014-09. We plan to adopt ASU 2014-09 effective January 1, 2018 using the modified retrospective method. Under this method, the guidance will be applied only to the most current period presented in the financial statements. While our technical analysis is on-going, we expect our revenue recognition policies to remain substantially unchanged as a result of adopting ASU 2014-09. Additionally, we do not anticipate significant changes in business processes or systems.

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. We are currently reviewing the guidance and assessing the impact on our consolidated financial statements.

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Cash, Cash Equivalents and Marketable Securities (Notes)

6 Months Ended

Jun. 30, 2017

Cash, Cash Equivalents and Marketable Securities [Abstract]

Cash, Cash Equivalents and Marketable Securities

3. Cash, Cash Equivalents and Marketable Securities

The following table summarizes our cash and investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	June 30, 2017			December 31, 2016
	(in thousands)
Overnight holdings
Money market funds (cash equivalents)	$	201,660		$	255,091
Investment holdings
Money market funds (cash equivalents)	28,567			28,231
Marketable securities	1,929			1,851
	232,156			285,173
Cash held in demand accounts	27,586			25,758
Outstanding checks	(15,923		)	(23,046		)
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885
Cash and cash equivalents	$	241,890		$	286,034
Marketable securities	1,929			1,851
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885

Our cash and overnight holdings fluctuate based on the timing of clients’ payroll processing cycles. Included in the cash, cash equivalents and marketable securities at June 30, 2017 and December 31, 2016, are $173.3 million and $221.7 million, respectively, of funds associated with federal and state income tax withholdings, employment taxes and other payroll deductions, as well as $22.3 million and $21.3 million in client prepayments, respectively.

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Fair Value Measurements Fair Value Measurements (Notes)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

4. Fair Value Measurements

We account for our financial assets in accordance with Accounting Standard Codification 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

Fair Value of Instruments Measured and Recognized at Fair Value

The following table summarizes the levels of fair value measurements of our financial assets:

	Fair Value Measurements
	(in thousands)
	June 30, 2017		Level 1		Level 2		Level 3
Money market funds	$	230,227	$	230,227	$	—	$	—
Municipal bonds	1,929		—		1,929		—
Total	$	232,156	$	230,227	$	1,929	$	—

	Fair Value Measurements
	(in thousands)
	December 31, 2016		Level 1		Level 2		Level 3
Money market funds	$	283,322	$	283,322	$	—	$	—
Municipal bonds	1,851		—		1,851		—
Total	$	285,173	$	283,322	$	1,851	$	—

The municipal bond securities valued as Level 2 investments are primarily pre-refunded municipal bonds that are secured by escrow funds containing U.S. government securities. Our valuation techniques used to measure fair value for these securities during the period consisted primarily of third party pricing services that utilized actual market data such as trades of comparable bond issues, broker/dealer quotations for the same or similar investments in active markets and other observable inputs.

Fair Value of Other Financial Instruments

The carrying amounts of cash, cash equivalents, restricted cash, accounts receivable, deposits and accounts payable approximate their fair values due to the short-term maturities of these instruments.

As of June 30, 2017, the carrying value of our borrowings under our revolving credit facility approximates fair value and was classified as Level 2 in the fair value hierarchy. Please read Note 5, “Long-Term Debt,” for additional information.

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Long-term Debt (Notes)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Revolving Credit Facility

5. Long-Term Debt

We have a revolving credit facility (the “Facility”) with borrowing capacity up to $200 million. The Facility may be increased to $250 million based on the terms and subject to the conditions set forth in the agreement relating to the Facility (the “Credit Agreement”). The Facility is available for working capital and general corporate purposes, including acquisitions, stock repurchases and issuances of letters of credit. Our obligations under the Facility are secured by 65% of the stock of our captive insurance subsidiary and are guaranteed by all of our domestic subsidiaries. At June 30, 2017, our outstanding balance on the Facility was $104.4 million, in addition we have an outstanding $1.0 million letter of credit issued under the Facility, providing us with an available borrowing capacity of $94.6 million.

The Facility matures on February 6, 2020. Borrowings under the Facility bear interest at an alternate base rate or LIBOR, at our option, plus an applicable margin. Depending on our leverage ratio, the applicable margin varies (i) in the case of LIBOR loans, from 2.00% to 2.75% and (ii) in the case of alternate base rate loans, from 0.00% to 0.75%. The alternate base rate is the highest of (i) the prime rate most recently published in The Wall Street Journal, (ii) the federal funds rate plus 0.50% and (iii) the 30-day LIBOR rate plus 2.00%. We also pay an unused commitment fee on the average daily unused portion of the Facility at a rate of 0.25%. The interest rate at June 30, 2017 was 2.78%. Interest expense and unused commitment fees are recorded in other income (expense).

The Facility contains both affirmative and negative covenants that we believe are customary for arrangements of this nature. Covenants include, but are not limited to, limitations on our ability to incur additional indebtedness, sell material assets, retire, redeem or otherwise reacquire our capital stock, acquire the capital stock or assets of another business, make investments and pay dividends. In addition, the Credit Agreement requires us to comply with financial covenants limiting our total funded debt, minimum interest coverage ratio and maximum leverage ratio. We were in compliance with all financial covenants under the Credit Agreement at June 30, 2017.

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Stockholders' Equity (Notes)

6 Months Ended

Jun. 30, 2017

Stockholders' Equity Note [Abstract]

Stockholders Equity

6. Stockholders' Equity

During the first six months of 2017, we repurchased or withheld an aggregate of 325,903 shares of our common stock, as described below.

Repurchase Program

Our Board of Directors (the “Board”) has authorized a program to repurchase shares of our outstanding common stock (“Repurchase Program”). The purchases are to be made from time to time in the open market or directly from stockholders at prevailing market prices based on market conditions and other factors. During the six months ended June 30, 2017, 239,487 shares were repurchased under the Repurchase Program. As of June 30, 2017, we were authorized to repurchase an additional 896,782 shares under the Repurchase Program.

Withheld Shares

During the six months ended, June 30, 2017, we withheld 86,416 shares to satisfy tax withholding obligations for the vesting of restricted stock awards.

Dividends

The Board declared quarterly dividends as follows:

	2017		2016
	(amounts per share)
First quarter	$	0.25	$	0.22
Second quarter	0.30		0.25

 During the six months ended June 30, 2017 and 2016, we paid dividends totaling $11.6 million and $10.0 million, respectively.

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Net Income Per Share (Notes)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Net Income per Share

7. Net Income per Share

We utilize the two-class method to compute net income per share. The two-class method allocates a portion of net income to participating securities, which include unvested awards of share-based payments with non-forfeitable rights to receive dividends. Net income allocated to unvested share-based payments is excluded from net income allocated to common shares. Any undistributed losses resulting from dividends exceeding net income are not allocated to participating securities. Basic net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options.

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017			2016			2017			2016
	(in thousands)
Net income	$	14,018		$	9,713		$	49,646		$	42,406
Less distributed and undistributed earnings allocated to participating securities	(248		)	(229		)	(909		)	(962		)
Net income allocated to common shares	$	13,770		$	9,484		$	48,737		$	41,444
Weighted average common shares outstanding	20,629			20,869			20,597			20,972
Incremental shares from assumed LTIP awards and conversions of common stock options	109			15			105			10
Adjusted weighted average common shares outstanding	20,738			20,884			20,702			20,982

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Commitments and Contingencies (Notes)

6 Months Ended

Jun. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

8. Commitments and Contingencies

Worksite Employee 401(k) Retirement Plan Class Action Litigation

In December 2015, a class action lawsuit was filed against us and the third party discretionary trustee of the Insperity 401(k) retirement plan available to eligible worksite employees (the “Plan”) in the United States District Court for the Northern District of Georgia, Atlanta Division, on behalf of Plan participants. This suit generally alleges that Insperity’s third-party discretionary trustee of the Plan and Insperity breached their fiduciary duties to plan participants by selecting an Insperity subsidiary to serve as the recordkeeper for the Plan, by causing participants in the Plan to pay excessive recordkeeping fees to the Insperity subsidiary, by failing to monitor other fiduciaries and by making imprudent investment choices. We believe we have meritorious defenses, and we intend to vigorously defend this litigation. As a result of uncertainty regarding the outcome of this matter, no provision has been made in the accompanying consolidated financial statements.

We are a defendant in various other lawsuits and claims arising in the normal course of business. Management believes it has valid defenses in these cases and is defending them vigorously. While the results of litigation cannot be predicted with certainty, management believes the final outcome of such litigation will not have a material adverse effect on our financial position or results of operations.

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Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Health Insurance Costs

Health Insurance Costs

We provide group health insurance coverage to our worksite employees in our PEO HR Outsourcing solutions through a national network of carriers, including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield, and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the costs of the United plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense in our Consolidated Statements of Operations. The estimated incurred claims are based upon: (i) the level of claims processed during the quarter; (ii) estimated completion rates based upon recent claim development patterns under the plan; and (iii) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $5.1 million as of June 30, 2017, and is reported as a long-term asset. As of June 30, 2017, Plan Costs were less than the net premiums paid and owed to United by $22.6 million. As this amount is in excess of the agreed-upon $9.0 million surplus maintenance level, the $13.6 million difference is included in prepaid insurance, a current asset, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at June 30, 2017 were $22.4 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred in the first six months of 2017 included costs of $0.5 million for changes in estimated run-off related to prior periods.

Workers' Compensation Costs

Workers’ Compensation Costs

Our workers’ compensation coverage for our worksite employees in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $5 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We employ a third party actuary to estimate our loss development rate, which is primarily based upon the nature of worksite employees’ job responsibilities, the location of worksite employees, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the six months ended June 30,2017 and 2016, we reduced accrued workers’ compensation costs by $8.0 million and $2.6 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate utilized in the 2017 period was 1.5% and in the 2016 period was 1.0%) and are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Six Months Ended   June 30,
	2017			2016
	(in thousands)
Beginning balance, January 1,	$	183,928		$	162,184
Accrued claims	34,242			35,045
Present value discount	(2,008		)	(1,274		)
Paid claims	(20,044		)	(19,038		)
Ending balance	$	196,118		$	176,917
Current portion of accrued claims	$	41,703		$	41,236
Long-term portion of accrued claims	154,415			135,681
	$	196,118		$	176,917

The current portion of accrued workers’ compensation costs on our Consolidated Balance Sheets at June 30, 2017 includes $2.2 million of workers’ compensation administrative fees.

As of June 30, 2017 and 2016, the undiscounted accrued workers’ compensation costs were $207.2 million and $187.0 million, respectively.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated worksite employee payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits - workers’ compensation, a long-term asset in our Consolidated Balance Sheets. As of June 30, 2017, we had restricted cash of $41.7 million and deposits - workers’ compensation of $157.9 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in long-term liabilities on our Consolidated Balance Sheets.

New Accounting Pronouncements, Policy [Policy Text Block]

New Accounting Pronouncements

We believe we have implemented the accounting pronouncements with a material impact on our financial statements and do not believe there are any new or pending pronouncements that will materially impact our financial position or results of operations, other than discussed below.

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 is effective for annual reporting periods beginning after December 15, 2017, and early adoption is permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt ASU No. 2014-09. We plan to adopt ASU 2014-09 effective January 1, 2018 using the modified retrospective method. Under this method, the guidance will be applied only to the most current period presented in the financial statements. While our technical analysis is on-going, we expect our revenue recognition policies to remain substantially unchanged as a result of adopting ASU 2014-09. Additionally, we do not anticipate significant changes in business processes or systems.

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. We are currently reviewing the guidance and assessing the impact on our consolidated financial statements.

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Fair Value Measurements Fair Vlue Measurements (Policies)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments, Policy [Policy Text Block]

We account for our financial assets in accordance with Accounting Standard Codification 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

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Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Activity and balances related to incurred but not paid workers' compensation claims

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Six Months Ended   June 30,
	2017			2016
	(in thousands)
Beginning balance, January 1,	$	183,928		$	162,184
Accrued claims	34,242			35,045
Present value discount	(2,008		)	(1,274		)
Paid claims	(20,044		)	(19,038		)
Ending balance	$	196,118		$	176,917
Current portion of accrued claims	$	41,703		$	41,236
Long-term portion of accrued claims	154,415			135,681
	$	196,118		$	176,917

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Cash, Cash Equivalents and Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2017

Cash, Cash Equivalents and Marketable Securities [Abstract]

Summary of investments in cash, cash equivalents and marketable securities

The following table summarizes our cash and investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	June 30, 2017			December 31, 2016
	(in thousands)
Overnight holdings
Money market funds (cash equivalents)	$	201,660		$	255,091
Investment holdings
Money market funds (cash equivalents)	28,567			28,231
Marketable securities	1,929			1,851
	232,156			285,173
Cash held in demand accounts	27,586			25,758
Outstanding checks	(15,923		)	(23,046		)
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885
Cash and cash equivalents	$	241,890		$	286,034
Marketable securities	1,929			1,851
Total cash, cash equivalents and marketable securities	$	243,819		$	287,885

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Fair Value Measurements Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following table summarizes the levels of fair value measurements of our financial assets:

	Fair Value Measurements
	(in thousands)
	June 30, 2017		Level 1		Level 2		Level 3
Money market funds	$	230,227	$	230,227	$	—	$	—
Municipal bonds	1,929		—		1,929		—
Total	$	232,156	$	230,227	$	1,929	$	—

	Fair Value Measurements
	(in thousands)
	December 31, 2016		Level 1		Level 2		Level 3
Money market funds	$	283,322	$	283,322	$	—	$	—
Municipal bonds	1,851		—		1,851		—
Total	$	285,173	$	283,322	$	1,851	$	—

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Stockholders' Equity Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2017

Stockholders' Equity Attributable to Parent [Abstract]

Quarterly dividends declared [Table Text Block]

The Board declared quarterly dividends as follows:

	2017		2016
	(amounts per share)
First quarter	$	0.25	$	0.22
Second quarter	0.30		0.25

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Net Income per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2017			2016			2017			2016
	(in thousands)
Net income	$	14,018		$	9,713		$	49,646		$	42,406
Less distributed and undistributed earnings allocated to participating securities	(248		)	(229		)	(909		)	(962		)
Net income allocated to common shares	$	13,770		$	9,484		$	48,737		$	41,444
Weighted average common shares outstanding	20,629			20,869			20,597			20,972
Incremental shares from assumed LTIP awards and conversions of common stock options	109			15			105			10
Adjusted weighted average common shares outstanding	20,738			20,884			20,702			20,982

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Accounting Policies (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Oct. 01, 2010
Health Insurance Costs [Abstract]
Number of days in advance of the beginning of a reporting quarter United establishes cash funding rates	90 days
Required accumulated cash surplus	$ 9,000		$ 9,000
Required deposit equal to approximately one day of claims funding activity	5,100
Amount which plan costs were less than the net premiums paid and owed	22,600
Prepaid health insurance, current	13,600
Premiums owed to United	22,400
Benefits costs incurred related to run-off	(500)
Workers' Compensation Costs [Abstract]
Company's maximum economic burden for the first layer of claims per occurrence				$ 1,000
Company's maximum aggregate economic burden for claims in excess of 1 million per policy year				$ 5,000
Decrease Increase in accrued workers' compensation costs for changes in estimated losses	$ 8,000	$ 2,600
U.S. Treasury rates that correspond with the weighted average estimated claim payout period (in hundredths)	1.50%	1.00%
Incurred but not paid workers compensation liabilities [Abstract]
Beginning balance, January 1,	$ 183,928	$ 162,184
Accrued claims	34,242	35,045
Present value discount	(2,008)	(1,274)
Paid claims	(20,044)	(19,038)
Ending balance	196,118	176,917
Current portion of accrued claims	41,703	41,236
Long-term portion of accrued claims	154,415	135,681	141,291
Workers compensation administrative fees accrued	2,200
Undiscounted accrued workers' compensation costs	$ 207,200	$ 187,000
Time period incurred claims expected to be paid recorded as restricted cash	1 year
Time period incurred claims expected to be paid, included in deposits, a long-term asset	Greater than 1 year
Restricted cash - worker's compensation	$ 41,703		42,637
Deposits workers compensation	$ 157,850		$ 143,938
Time period estimate of incurred claim costs to be paid included in short-term liabilities	1 year
Time period incurred claims expected to be paid, included in long-term liabilities	Greater than 1 year

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Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Overnight holdings
Money market funds (cash equivalents)	$ 201,660	$ 255,091
Investment holdings
Money market funds (cash equivalents)	28,567	28,231
Marketable securities	1,929	1,851
Total cash equivalents and marketable securities	232,156	285,173
Cash held in demand accounts	27,586	25,758
Outstanding checks	(15,923)	(23,046)
Total cash, cash equivalents and marketable securities	243,819	287,885
Cash and cash equivalents	241,890	286,034	$ 271,573	$ 269,538
Marketable securities	1,929	1,851
Withholding associated with federal and state income taxes, employment taxes and other payroll deductions included in cash balance	173,300	221,700
Client prepayments included in cash balance	$ 22,300	$ 21,300

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Fair Value Measurements Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 230,227	$ 283,322
Municipal bonds	1,929	1,851
Total	232,156	285,173
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	230,227	283,322
Municipal bonds	0	0
Total	230,227	283,322
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Municipal bonds	1,929	1,851
Total	1,929	1,851
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Municipal bonds	0	0
Total	$ 0	$ 0

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Long-term Debt (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 200,000
Maximum borrowing capacity	$ 250,000
Percentage Of Subsidiary Stock Securing Debt	0.65
Long-term debt	$ 104,400	$ 104,400
Letters of Credit Outstanding, Amount	1,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 94,600
Applicable Margin Federal Funds Rate	0.50%
Applicable Margin 30 Day Libor	2.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Line of Credit Facility, Interest Rate During Period	2.78%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%

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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016
Stockholders' Equity Note [Abstract]
Aggregate number of shares repurchased during the period (in shares)					325,903
Shares repurchased under the program (in shares)					239,487
Authorized to repurchased additional shares under repurchase program (in shares)	896,782				896,782
Shares withheld for tax withholding obligations for the vesting of restricted stock awards (in shares)					86,416
Dividends declared per share of common stock (in dollars per share)	$ 0.30	$ 0.25	$ 0.25	$ 0.22
Payments of Dividends					$ 11,579	$ 9,997

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Net Income per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 14,018	$ 9,713	$ 49,646	$ 42,406
Less distributed and undistributed earnings allocated to participating securities	248	229	909	962
Net Income (Loss) Available to Common Stockholders, Basic	$ 13,770	$ 9,484	$ 48,737	$ 41,444
Weighted average common shares outstanding basic (in shares)	20,629	20,869	20,597	20,972
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	109	15	105	10
Weighted Average Number of Shares Outstanding, Diluted	20,738	20,884	20,702	20,982

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Commitments and Contingencies Commitments and Contingencies (Details)	6 Months Ended
	Jun. 30, 2017 USD ($)
Commitments and Contingencies Disclosure (Details) [Abstract]
Loss Contingency Accrual, Provision	$ 0