Healthcare Services (HCSG) 10-K 18 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 14, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	HEALTHCARE SERVICES GROUP INC
Entity Central Index Key	0000731012
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
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 Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,020,000
Entity Common Stock, Shares Outstanding		74,036

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,025	$ 9,557
Marketable securities, at fair value	76,362	73,221
Accounts and notes receivable, less allowance for doubtful accounts of $47,209 and $11,985 as of December 31, 2018 and 2017, respectively	341,838	378,720
Inventories and supplies	41,443	42,393
Prepaid expenses and other assets	22,468	23,515
Total current assets	508,136	527,406
Property and equipment, net	12,900	13,509
Goodwill	51,084	51,084
Other intangible assets, less accumulated amortization of $17,216 and $12,853 as of December 31, 2018 and 2017, respectively	26,518	30,881
Notes receivable – long–term portion, less allowance for doubtful accounts of $10,000 and $0 as of December 31, 2018 and 2017, respectively	43,043	15,476
Deferred compensation funding, at fair value	29,113	28,885
Deferred income taxes	20,552	7,498
Other noncurrent assets	1,257	1,264
Total assets	692,603	676,003
Current liabilities:
Accounts payable	61,467	74,463
Accrued payroll, accrued and withheld payroll taxes	35,198	32,139
Other accrued expenses	8,890	4,561
Borrowings under line of credit	30,000	35,382
Income taxes payable	7,140	15,378
Accrued insurance claims	20,696	22,245
Total current liabilities	163,391	184,168
Accrued insurance claims — long-term portion	58,904	62,454
Deferred compensation liability	29,528	29,429
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Common Stock, $.01 par value; 100,000 shares authorized; 75,344 and 74,960 shares issued, and 73,877 and 73,436 shares outstanding as of December 31, 2018 and 2017, respectively	753	750
Additional paid-in capital	259,440	244,363
Retained earnings	190,092	163,860
Accumulated other comprehensive income, net of taxes	158	837
Common Stock in treasury, at cost, 1,467 shares and 1,524 shares as of December 31, 2018 and 2017, respectively	(9,663)	(9,858)
Total stockholders’ equity	440,780	399,952
Total liabilities and stockholders' equity	$ 692,603	$ 676,003

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Allowance for doubtful accounts	$ 47,209	$ 11,985
Accumulated amortization of other intangible assets	17,216	12,853
Allowance for doubtful accounts, noncurrent	$ 10,000	$ 0
STOCKHOLDERS’ EQUITY:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	100,000,000	100,000,000
Common stock issued (in shares)	75,344,000	74,960,000
Common stock outstanding (in shares)	73,877,000	73,436,000
Common stock in treasury (in shares)	1,467,000	1,524,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 2,008,821	$ 1,866,131	$ 1,562,662
Operating costs and expenses:
Costs of services provided	1,771,981	1,612,510	1,339,492
Selling, general and administrative	136,603	126,732	105,417
Other (expense) income:
Investment and interest	(327)	6,076	2,634
Income before income taxes	99,910	132,965	120,387
Income taxes	16,386	44,739	42,991
Net income	$ 83,524	$ 88,226	$ 77,396
Per share data:
Basic earnings per common share (in dollars per share)	$ 1.13	$ 1.20	$ 1.06
Diluted earnings per common share (in dollars per share)	$ 1.12	$ 1.19	$ 1.05
Weighted average number of common shares outstanding:
Basic (in shares)	74,002	73,355	72,754
Diluted (in shares)	74,612	74,348	73,474
Comprehensive income:
Net income	$ 83,524	$ 88,226	$ 77,396
Other comprehensive income:
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes	(679)	1,156	(862)
Total comprehensive income	$ 82,845	$ 89,382	$ 76,534

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income		$ 83,524	$ 88,226	$ 77,396
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		9,272	8,886	7,496
Bad debt provision		51,387	6,250	4,629
Deferred income tax (benefit) expense		(13,013)	1,887	3,001
Stock-based compensation expense	[1]	5,900	5,985	4,252
Tax benefit from equity compensation plans	[1]	0	0	(2,981)
Amortization of premium on marketable securities		1,373	1,296	1,723
Unrealized loss (gain) on deferred compensation fund investments		1,429	(4,509)	(1,460)
Changes in operating assets and liabilities:
Accounts and notes receivable		(44,363)	(121,639)	(65,610)
Inventories and supplies		950	(1,873)	(1,492)
Prepaid expenses and other assets		1,054	(9,545)	(2,470)
Deferred compensation funding		(1,536)	(257)	2,732
Accounts payable and other accrued expenses		(9,144)	11,197	(4,251)
Accrued payroll, accrued and withheld payroll taxes		6,085	11,927	6,307
Accrued insurance claims		(5,099)	(2,954)	5,404
Deferred compensation liability		450	5,061	(731)
Income taxes payable	[1]	(8,238)	7,692	7,455
Net cash provided by operating activities		80,031	7,630	41,400
Cash flows from investing activities:
Disposals of fixed assets		640	338	275
Additions to property and equipment		(4,940)	(5,397)	(5,442)
Purchases of marketable securities		(14,297)	(33,861)	(29,449)
Sales of marketable securities		9,011	28,537	28,164
Cash paid for acquisitions		0	(4,584)	0
Net cash used in investing activities		(9,586)	(14,967)	(6,452)
Cash flows from financing activities:
Dividends paid		(57,201)	(55,244)	(53,342)
Reissuance of treasury stock pursuant to Dividend Reinvestment Plan		89	95	109
Tax benefit from equity compensation plans		0	0	2,981
Proceeds from the exercise of stock options		8,517	12,808	5,968
Net (repayments) proceeds from short-term borrowings		(5,382)	35,382	0
Net cash used in financing activities		(53,977)	(6,959)	(44,284)
Net change in cash and cash equivalents		16,468	(14,296)	(9,336)
Cash and cash equivalents at beginning of the period		9,557	23,853	33,189
Cash and cash equivalents at end of the period		26,025	9,557	23,853
Supplementary cash flow information:
Cash paid for interest		3,094	1,363	574
Cash paid for income taxes, net of refunds		37,680	35,367	32,532
Contingent shares settled pursuant to acquisition		$ 2,291	$ 0	$ 0
[1]	The Company adopted the provisions of ASU 2016-09 prospectively, and as such the amounts reflected for the year ended December 31, 2016 have not been adjusted.

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss), net of Taxes	Retained Earnings	Treasury Stock
Balance (in shares) at Dec. 31, 2015		73,793
Balance at Dec. 31, 2015	$ 296,456	$ 738	$ 199,294	$ 543	$ 106,886	$ (11,005)
Comprehensive income:
Net income for the period	77,396				77,396
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes	(862)			(862)
Total comprehensive income	76,534
Exercise of stock options and other stock-based compensation, net of shares tendered for payment (in shares)		301
Exercise of stock options and other stock-based compensation, net of shares tendered for payment	5,968	$ 3	5,965
Tax benefit from equity compensation plans	2,773		2,773
Share-based compensation expense — stock options, restricted stock and restricted stock units	3,743		3,743
Treasury shares issued for Deferred Compensation Plan funding and redemptions	534		103			431
Shares issued pursuant to Employee Stock Plans	2,067		1,696			371
Dividends paid and accrued	(53,342)				(53,342)
Shares issued pursuant to Dividend Reinvestment Plan	109		91			18
Shares issued pursuant to previous settlement (in shares)		113
Shares issued pursuant to previous settlement	4,000	$ 1	3,999
Other (in shares)		(3)
Other	0
Balance (in shares) at Dec. 31, 2016		74,204
Balance at Dec. 31, 2016	338,842	$ 742	217,664	(319)	130,940	(10,185)
Comprehensive income:
Net income for the period	88,226				88,226
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes	1,156			1,156
Total comprehensive income	89,382
Exercise of stock options and other stock-based compensation, net of shares tendered for payment (in shares)		697
Exercise of stock options and other stock-based compensation, net of shares tendered for payment	12,808	$ 7	12,801
Share-based compensation expense — stock options, restricted stock and restricted stock units	4,945		4,945
Treasury shares issued for Deferred Compensation Plan funding and redemptions	156		181			(25)
Shares issued pursuant to Employee Stock Plans	2,091		1,752			339
Dividends paid and accrued	(55,306)				(55,306)
Shares issued pursuant to Dividend Reinvestment Plan	95		82			13
Shares issued pursuant to acquisition (in shares)		59
Shares issued pursuant to acquisition	6,939	$ 1	6,938
Balance (in shares) at Dec. 31, 2017		74,960
Balance at Dec. 31, 2017	399,952	$ 750	244,363	837	163,860	(9,858)
Comprehensive income:
Net income for the period	83,524				83,524
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes	(679)			(679)
Total comprehensive income	82,845
Exercise of stock options and other stock-based compensation, net of shares tendered for payment (in shares)		380
Exercise of stock options and other stock-based compensation, net of shares tendered for payment	8,517	$ 3	8,514
Share-based compensation expense — stock options, restricted stock and restricted stock units	5,580		5,580
Treasury shares issued for Deferred Compensation Plan funding and redemptions	354		519			(165)
Shares issued pursuant to Employee Stock Plans	2,821		2,475			346
Dividends paid and accrued	(57,361)				(57,361)
Shares issued pursuant to Dividend Reinvestment Plan	89		75			14
Contingent shares settled pursuant to acquisition	(2,291)		(2,291)
Other (in shares)		4
Other	274		205		69
Balance (in shares) at Dec. 31, 2018		75,344
Balance at Dec. 31, 2018	$ 440,780	$ 753	$ 259,440	$ 158	$ 190,092	$ (9,663)

Description of Business and Sig

Description of Business and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Description of Business and Significant Accounting Policies	Note 1— Description of Business and Significant Accounting Policies Nature of Operations Healthcare Services Group, Inc. (the “Company”) provides management, administrative and operating expertise and services to the housekeeping, laundry, linen, facility maintenance and dietary service departments of the healthcare industry, including nursing homes, retirement complexes, rehabilitation centers and hospitals located throughout the United States. Although the Company does not directly participate in any government reimbursement programs, the Company’s clients receive government reimbursements related to Medicare and Medicaid. Therefore, they are directly affected by any legislation relating to Medicare and Medicaid reimbursement programs. The Company provides services primarily pursuant to full service agreements with its clients. In such agreements, the Company is responsible for the day-to-day management of employees located at the clients’ facilities. The Company also provides services on the basis of management-only agreements for a limited number of clients. The agreements with clients typically provide for a renewable one year service term, cancelable by either party upon 30 to 90 days’ notice after an initial period of 60 to 120 days. The Company is organized into two reportable segments; housekeeping, laundry, linen and other services (“Housekeeping”), and dietary department services (“Dietary”). Housekeeping consists of managing the clients’ housekeeping departments, which are principally responsible for the cleaning, disinfecting and sanitizing of resident rooms and common areas of a client’s facility, as well as the laundering and processing of the bed linens, uniforms, resident personal clothing and other assorted linen items utilized at a client facility. Dietary consists of managing the clients’ dietary departments, which are principally responsible for food purchasing, meal preparation and dietitian professional services, which includes the development of menus that meet residents’ dietary needs. Use of Estimates in Financial Statements In preparing financial statements in conformity with U.S. GAAP, estimates and assumptions are made that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Significant estimates are used in determining, but are not limited to, the Company’s allowance for doubtful accounts, accrued insurance claims, valuations, deferred taxes and reviews for potential impairment. The estimates are based upon various factors including current and historical trends, as well as other pertinent industry and regulatory authority information. Management regularly evaluates this information to determine if it is necessary to update the basis for its estimates and to adjust for known changes. Principles of Consolidation The accompanying consolidated financial statements include the accounts of Healthcare Services Group, Inc. and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. Fair Value of Financial Instruments The Company determines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company utilizes valuation techniques that maximize the use of observable inputs (Levels 1 and 2) and minimize the use of unobservable inputs (Level 3) within the fair value hierarchy. Assets and liabilities are classified within the fair value hierarchy based on the lowest level (least observable) input that is significant to the measurement in its entirety. While unobservable inputs reflect the Company's market assumptions. Preference is given to observable inputs. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets; Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable; and Level 3 – Significant inputs to the valuation model are unobservable The Company’s financial instruments that are measured at fair value on a recurring basis consist of marketable securities and the deferred compensation fund investments. Other financial instruments such as cash and cash equivalents, accounts and notes receivable, accounts payable (including income taxes payable and accrued expenses) and borrowings under the Company’s line of credit are short-term in nature, and therefore the carrying value of these instruments are deemed to approximate their fair value. The Company has certain notes receivable that either do not bear interest or bear interest at a below-market rate. Therefore, such notes receivable of $2.9 million and $6.9 million at December 31, 2018 and 2017, respectively, have been discounted to their present value and are reported at values of $2.9 million and $6.8 million at December 31, 2018 and 2017, respectively. See Note 6—Fair Value Measurements for the fair value hierarchy table and for details on the measurement of fair value for assets and liabilities. Cash and Cash Equivalents Cash and cash equivalents are held in U.S. financial institutions or in custodial accounts with U.S. financial institutions. Cash equivalents are defined as short-term, highly liquid investments with a maturity of three months or less at time of purchase that are readily convertible into cash and have insignificant interest rate risk. Investments in Marketable Securities Marketable securities are defined as fixed income investments which are highly liquid and can be readily purchased or sold through established markets. As of December 31, 2018 and 2017, the Company had marketable securities of $76.4 million and $73.2 million, respectively, which were comprised primarily of tax-exempt municipal bonds. These investments are accounted for as available-for-sale securities and are reported at fair value on the balance sheet. For the years ended December 31, 2018 and 2017, $0.8 million of unrealized losses and $1.1 million of unrealized gains related to these investments were recorded in other comprehensive income, respectively. Unrealized gains and losses are recorded net of income taxes. These assets are available for future needs under the Company’s self-insurance programs and are held by the Company's wholly-owned captive subsidiary as required by state insurance regulations. The Company’s investment policy is intended to manage the assets to achieve the goals of preserving principal, maintaining adequate liquidity at all times, and maximizing returns subject to investment guidelines. The investment policy limits investment to certain types of instruments issued by institutions primarily with investment grade credit ratings and places restrictions on concentration by type and issuer. The Company periodically reviews the investments in marketable securities for other than temporary declines in fair value below the cost basis and whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. As of December 31, 2018, management believes that the recorded value of the Company’s investments in marketable securities was recoverable in all material respects. See Note 6—Fair Value Measurements for other than temporary impairment considerations. Inventories and Supplies Inventories and supplies include housekeeping, linen and laundry supplies, as well as food provisions and supplies. Non-linen inventories and supplies are stated at cost to approximate a first-in, first-out (FIFO) basis. Linen supplies are amortized on a straight-line basis over their estimated useful life of 24 months. Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation. Additions, renewals and improvements are capitalized, while maintenance and repair costs are expensed when incurred. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the respective accounts and any resulting gain or loss is included in income. Depreciation is recorded using the straight-line method over the following estimated useful lives: Housekeeping and Dietary equipment — 5 to 7 years; computer hardware and software — 3 to 7 years; and other, consisting of furniture and fixtures, leasehold improvements and vehicles — 5 to 10 years. Depreciation expense on property and equipment for the years ended December 31, 2018, 2017 and 2016 was $4.9 million, $5.0 million and $4.8 million, respectively. Revenue Recognition The Company recognizes revenue from service agreements with customers when or as the promised goods and services are provided to customers. Revenues are reported net of sales taxes that are collected from customers and remitted to taxing authorities. The guidance under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification subtopic 606 Revenue from Contracts with Customers (“ASC 606”) became effective and was adopted by the Company as of January 1, 2018, by applying the modified retrospective method for contracts that were not completed as of January 1, 2018. The standard requires the Company to recognize revenue as the promised goods and services within the terms of the Company’s contracts are performed and satisfied. The amount of revenue which the Company recognizes is based on the consideration which the Company expects to be entitled to in exchange for contracted promised goods and services. The adoption of this standard did not have a material impact to the Company's accounting for revenue earned relating to the Housekeeping and Dietary segments. The Company also did not recognize an opening adjustment to retained earnings as a result of the adoption of the standard. See Note 2—Revenue herein for additional revenue disclosure that is being presented as a result of the newly adopted standard. Prior period amounts were not adjusted and continue to be reported in accordance with previous guidance. Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, income tax expense is recognized for the amount of taxes payable or refundable for the current period. The Company accrues for probable tax obligations as required by facts and circumstances in various regulatory environments. In addition, deferred tax assets and liabilities are recognized for expected future tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. When appropriate, valuation allowances are recorded to reduce deferred tax assets to amounts for which realization is more likely than not. Deferred tax assets and liabilities are more fully described in Note 13— Income Taxes. Uncertain income tax positions taken or expected to be taken in tax returns are reflected within the Company’s financial statements based on a recognition and measurement process. The Company may from time to time be assessed interest or penalties by taxing jurisdictions, although any such assessments historically have been minimal and immaterial to its financial results. When the Company has received an assessment for interest and/or penalties, it will be classified in the financial statements as selling, general and administrative expense. In addition, any interest or penalties relating to recognized uncertain tax positions would also be recorded in selling, general and administrative expense. Earnings per Common Share Basic earnings per common share is computed by dividing income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per common share is calculated using the weighted-average number of common shares outstanding and dilutive common shares, such as those issuable upon exercise of stock options and upon the vesting of restricted stock and restricted stock units. Share-Based Compensation The Company estimates the fair value of share-based awards on the date of grant using the Black-Scholes valuation model for stock options and using the share price on the date of grant for restricted stock and restricted stock units. The value of the award is recognized ratably as an expense in the Company’s Consolidated Statements of Comprehensive Income over the requisite service periods, with adjustments made for forfeitures as they occur. Advertising Costs Advertising costs are expensed when incurred. Advertising costs were not material for the years ended December 31, 2018, 2017 and 2016. Impairment of Long-Lived Assets The carrying amounts of long-lived assets are periodically reviewed to determine whether current events or circumstances warrant adjustment to such carrying amounts. Any impairment would be measured as the amount that the carrying value of such assets exceeds their fair value, primarily based on estimated undiscounted cash flows. Considerable management judgment is necessary to estimate the fair value of assets. Assets to be disposed of are carried at the lower of their financial statement carrying amount or fair value, less cost to sell. Identifiable Intangible Assets and Goodwill Identifiable intangible assets are amortized on a straight-line basis over their respective lives. Goodwill represents the excess of cost over the fair value of net assets of acquired businesses. Management reviews the carrying value of goodwill at least annually during the fourth quarter of each year to assess for impairment, or more often if events or circumstances indicate that the carrying value may exceed its estimated fair value. No impairment loss was recognized on the Company’s intangible assets or goodwill for the years ended December 31, 2018, 2017 or 2016. In 2018, the Company adopted the FASB issued Accounting Standards Update 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 no longer requires the Company to perform a hypothetical purchase price allocation to measure impairment, eliminating step 2 of the goodwill impairment test. Instead, impairment is measured using the difference of the carrying amount to the fair value of goodwill on a reporting unit basis. Additionally in 2018, the Company adopted the FASB issued Accounting Standards Update 2018-15, Intangibles - Goodwill and Other - Internal-Use Software ("ASU 2018-15). ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The results of applying ASU 2018-15 were insignificant and did not have a material impact on the Company's consolidated financial statements. The capitalized implementation costs incurred from adopting ASU 2018-15 are recorded in the prepaid expenses and other assets caption in the Consolidated Balance Sheets. Treasury Stock Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as treasury stock. Gains or losses on the subsequent reissuance of shares are credited or charged to additional paid-in capital. Reclassification Certain prior period amounts have been reclassified to conform to current year presentation, including the presentation of tax benefit from equity compensation plans in the Consolidated Statements of Cash Flows. The tax benefit from equity compensation plans is now reflected as a component of the change in income taxes payable, as opposed to an offset to stock-based compensation expense. There was no impact to the Company's net cash provided by operating activities as a result of the immaterial correction. Concentrations of Credit Risk The financial instruments that are subject to concentrations of credit risk are cash and cash equivalents, marketable securities, deferred compensation funding and accounts and notes receivable. The Company’s marketable securities are fixed income investments which are highly liquid and can be readily purchased or sold through established markets. At December 31, 2018 and 2017, substantially all of the Company’s cash and cash equivalents and marketable securities were held in one large financial institution located in the United States. The Company’s clients are concentrated in the healthcare industry and are primarily providers of long-term care. The revenues of many of the Company’s clients are highly reliant on Medicare, Medicaid and third party payors’ reimbursement funding rates. New legislation or changes in existing regulations could directly impact the governmental reimbursement programs in which the clients participate. As a result, the Company may not know the full effects of such programs until these laws are fully implemented and governmental agencies issue applicable regulations or guidance. Significant Clients For the years ended December 31, 2018 and 2017, the Company had several clients who individually contributed over 3% of the Company's consolidated revenues, including Genesis Healthcare, Inc. ("Genesis") which accounted for $386.7 million or 19.3% and $327.5 million or 17.5%, respectively. Although the Company expects to continue its relationships with these clients, there can be no assurance thereof. The loss, individually or in the aggregate, of such clients, or a significant reduction in the revenues the Company receives from such clients, could have a material adverse effect on the Company’s results of operations. In addition, if any of these clients change or alter current payments terms, it could increase the Company’s accounts receivables balance and have a material adverse effect on the Company’s cash flows. Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases ("ASC 842"). ASC 842 requires lessees to recognize assets and liabilities on their balance sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their income statements over the lease term. It will also require disclosures designed to give financial statement users information regarding the amount, timing, and uncertainty of cash flows arising from leases. The guidance is effective for annual reporting periods beginning after December 15, 2018, and interim periods within those years. This guidance may be applied through a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements with certain practical expedients available. Alternatively, this guidance may also be applied at the adoption date by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. ASC 842 provides several optional practical expedients in transition including the ‘package of practical expedients,’ which permits the Company to not reassess under the new standard the Company's prior conclusions about lease identification, lease classification and initial direct costs. ASC 842 also provides the Company the option to, as an accounting policy, not capitalize lease obligations for leases with lease terms of less than 12 months. The Company adopted ASC 842 as of January 1, 2019 using a modified retrospective transition approach which resulted in the capitalization of the Company's existing operating leases as of January 1, 2019 which consisted of office space, vehicles and equipment. The Company elected to adopt ASC 842 using the package of practical expedients mentioned above and elected to not capitalize leases with lease terms of less than 12 months. The lease liability and corresponding right-of-use asset recognized upon adoption of ASU 842 was $11.4 million. The Company does not expect ASC 842 to have a material impact to the Consolidated Statements of Operations however will require additional disclosures pertaining to the Company's lease commitments. The Company did not recognize a cumulative-effect adjustment to the opening balance of retained earnings. In June 2016, the FASB issued ASU No. 2016-13, Credit Losses - Measurement of Credit Losses on Financial Instruments ("ASC 326"). The standard significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The standard is effective for interim and annual reporting periods beginning after December 15, 2019. The Company is currently assessing the impact of adopting this standard on the Company’s financial statements and related disclosures.

Revenue

Revenue	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue	Note 2—Revenue The Company disaggregates its consolidated revenues by reportable segment, as management evaluates the nature, amount, timing and uncertainty of the Company’s revenues by segment. Refer to Note 15—Segment Information herein as well as the information below regarding the Company’s reportable segments. Housekeeping Housekeeping accounted for $973.8 million, $979.6 million and $957.1 million, of the Company’s consolidated revenues for the years ended December 31, 2018, 2017 and 2016, respectively. The services provided under this segment include managing clients’ housekeeping departments, which are principally responsible for the cleaning, disinfecting and sanitizing of resident rooms and common areas of the clients’ facilities, as well as the laundering and processing of the bed linens, uniforms, resident personal clothing and other assorted linen items utilized at the clients’ facilities. Upon beginning service with a client facility, the Company will typically hire and train the employees previously employed by such facility and assign an on-site manager to supervise and train the front-line personnel and coordinate housekeeping services with other facility support functions in accordance with client requests. Such management personnel also oversee the execution of various cost and quality-control procedures including continuous training and employee evaluation, and on-site testing for infection control. Dietary Dietary services represented $1,035.0 million, $886.5 million and $605.5 million, of the Company’s consolidated revenues for the years ended December 31, 2018, 2017 and 2016, respectively. Dietary services consist of managing clients’ dietary departments which are principally responsible for food purchasing, meal preparation and professional dietitian services, which include the development of menus that meet the dietary needs of residents. On-site management is responsible for all daily dietary department activities, with regular support provided by a District Manager specializing in dietary services. The Company also offers clinical consulting services to facilities which if contracted is a service bundled within the monthly service provided to clients. Upon beginning service with a client facility, the Company will typically hire and train the employees previously employed by such facility and assign an on-site manager to supervise and train the front-line personnel and coordinate dietitian services with other facility support functions in accordance with client requests. Such management personnel also oversee the execution of various cost- and quality-control procedures including continuous training and employee evaluation. Revenue Recognition Substantially all of the Company's revenues are derived from contracts with customers. The Company accounts for revenue from contracts with customers in accordance with ASC 606, and as such, the Company recognizes revenue to depict the transfer of promised goods and services to customers in amounts that reflect the consideration to which the Company expects to be entitled in exchange for those goods and services. The Company’s costs of obtaining contracts are not material. The Company performs services and provides goods in accordance with contracts with its customers. Such contracts typically provide for a renewable one year service term, cancelable by either party upon 30 to 90 days' notice, after an initial period of 60 to 120 days. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is defined as the unit of account under ASC 606. The Company’s Housekeeping and Dietary contracts relate to the provision of bundles of goods, services or both, which represent a series of distinct goods and services and that are substantially the same and that have the same pattern of transfer to the customer. Accordingly, the Company accounts for the series as a single performance obligation satisfied over time, as the customer simultaneously receives and consumes the benefits of the goods and services provided. Revenue is recognized using the output method, which is based upon the delivery of goods and services to the clients’ facilities. In limited cases, the Company provides goods, services or both, before the execution of a written contract. In these cases, the Company defers the recognition of revenue until a contract is executed. The amount of such deferred revenue was $0.2 million as of December 31, 2018. There were no such deferred revenues as of December 31, 2017 The transaction price is the amount of consideration to which the Company expects to be entitled in exchange for transferring promised goods or services to its customers. The transaction price does not include taxes assessed or collected. The Company’s contracts detail the fees that the Company charges for the goods and services it provides. For certain contracts which contain a variable component to the transaction price, the Company is required to make estimates of the amount of consideration to which the Company will be entitled, based on variability in resident and patient populations serviced, product usage or quantities consumed. The Company recognizes revenue related to such estimates only when management determines that there will not be a significant reversal in the amount of revenue recognized. The Company’s contracts generally do not contain significant financing components, as the contracts contain payment terms that are less than one year. The Company allocates the transaction price to each performance obligation, noting that the bundle of goods, services or goods and services provided under each Housekeeping and Dietary contract represents a single performance obligation that is satisfied over time. The Company recognizes the related revenue when it satisfies the performance obligation by transferring a bundle of promised goods, services or both to a customer. Such recognition is on a monthly or weekly basis, as goods are provided and services are performed. The time between completion of the performance obligation and collection of cash is consistent with the customers' payment terms and typically not more than 30-60 days. In certain contractual arrangements, the Company requires customers to pay in advance for goods and services to be provided. As of December 31, 2018, the value of the associated contract liabilit ies for such collections in advance was $4.6 million. As of December 31, 2017, the Company did not have any such contract liabilities. Remaining Performance Obligations The Company recognizes revenue as it satisfies the performance obligations associated with contracts with customers, which due to the nature of the goods and services provided by the Company, are satisfied over time. Contracts may contain transaction prices that are fixed, variable or both. The significant majority of the Company’s contracts with customers have an initial term of one year or less, with a renewable one year service term, cancelable by either party upon 30 to 90 days’ notice after an initial period of 60 to 120 days. For the purpose of disclosing future revenues under its remaining performance obligations, the Company elected to apply practical expedients available under the guidance in ASC 606 to exclude from the calculation future revenues expected for the performance of services under contracts with variable consideration that are for a term of one year or less. Although only a small portion of the Company’s contracts have an original expected duration that exceeds one year, the Company has historically had, and expects to continue to have, favorable client retention rates. As of December 31, 2018, the revenue expected to be recognized from remaining performance obligations under the Company’s existing contracts with a term greater than one year is $186.2 million for 2019, $186.2 million for 2020, $186.2 million for 2021, $186.2 million for 2022, $186.2 million for 2023, and $31.0 million thereafter

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income by Component	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in Accumulated Other Comprehensive Income by Component	Note 3—Changes in Accumulated Other Comprehensive Income by Component For the years ended December 31, 2018, 2017 and 2016, the Company’s other comprehensive income related to the unrealized gains and losses from the Company’s available-for-sale marketable securities. The following table provides a summary of changes in accumulated other comprehensive income, net of taxes: Unrealized Gains and (Losses) on Available-for Sale-Securities 1 2018 2017 2016 (in thousands) Accumulated other comprehensive income (loss) — beginning balance $ 837 $ (319) $ 543 Other comprehensive (loss) income before reclassifications (844) 1,149 (1,005) Losses reclassified from other comprehensive income 2 165 7 143 Net current period other comprehensive (loss) income 3 (679) 1,156 (862) Accumulated other comprehensive income (loss) — ending balance $ 158 $ 837 $ (319) 1 All amounts are net of tax. 2 Realized losses were recorded pre-tax under “Other income, net - Investment and interest” in our Consolidated Statements of Comprehensive Income. For the years ended December 31, 2018, 2017 and 2016 the Company recorded $0.2 million, less than $0.1 million and $0.2 million of realized losses from the sale of available-for-sale securities, respectively. Refer to Note 6—Fair Value Measurements herein for further information. 3 For the years ended December 31, 2018 and 2016, the changes in other comprehensive income were net of a tax benefit of $0.1 million and $0.5 million, respectively. For the year ended December 31, 2017 the changes in other comprehensive income were net of a tax expense of $0.3 million. Amounts Reclassified from Accumulated Other Comprehensive Income 2018 2017 2016 For the Year Ended December 31, (in thousands) Losses from the sale of available-for-sale securities $ 197 $ 11 $ 222 Tax benefit (32) (4) (79) Net loss reclassified from accumulated other comprehensive income $ 165 $ 7 $ 143

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property and Equipment	Note 4—Property and Equipment Property and equipment are recorded at cost. Depreciation is computed using the straight-line method and is recorded over the estimated useful life of each class of depreciable asset. Leasehold improvements are amortized over the shorter of the estimated asset life or term of the lease. Repairs and maintenance costs are charged to expense as incurred. The following table sets forth the amounts of property and equipment by each class of depreciable asset as of December 31, 2018 and December 31, 2017: December 31, 2018 December 31, 2017 (in thousands) Housekeeping and Dietary equipment $ 22,596 $ 22,349 Computer hardware and software 12,114 12,665 Other 1 920 990 Total property and equipment, at cost 35,630 36,004 Less accumulated depreciation 22,730 22,495 Total property and equipment, net $ 12,900 $ 13,509 1 Includes furniture and fixtures, leasehold improvements and autos and trucks.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 5—Goodwill and Other Intangible Assets Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets of acquired businesses. Goodwill is not amortized, but is evaluated for impairment on an annual basis, or more frequently if impairment indicators arise. To date, the Company has not recognized an impairment of its goodwill. Goodwill by reportable operating segment, as described in Note 15—Segment Information, was approximately $42.4 million and $8.7 million for Housekeeping and Dietary, respectively, as of December 31, 2018 and 2017. Intangible Assets The Company’s intangible assets consist of customer relationships which were obtained through acquisitions and are recorded at their fair values at the date of acquisition. Intangible assets with determinable lives are amortized on a straight-line basis over their estimated useful lives. The customer relationships have a weighted-average amortization period of 9.9 years. The following table sets forth the estimated amortization expense for intangibles subject to amortization for the next five years and thereafter: Period/Year Total Amortization Expense (in thousands) 2019 $ 4,165 2020 $ 4,165 2021 $ 4,165 2022 $ 4,165 2023 $ 3,168 Thereafter $ 6,690 Amortization expense for the years ended December 31, 2018, 2017 and 2016 was $4.4 million, $3.9 million and $2.7 million, respectively.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 6—Fair Value Measurements The Company’s current assets and current liabilities are financial instruments and most of these items (other than marketable securities and inventories) are recorded at cost in the Consolidated Balance Sheets. The estimated fair value of these financial instruments approximates their carrying value due to their short-term nature. The carrying value of the Company’s line of credit represents the outstanding amount of the borrowings, which approximates fair value. The Company’s financial assets that are measured at fair value on a recurring basis are its marketable securities and deferred compensation funding. The recorded values of all of the financial instruments approximate their current fair values because of their nature, stated interest rates and respective maturity dates or durations. The Company’s marketable securities consist of tax-exempt municipal bonds, which are classified as available-for-sale and are reported at fair value. Unrealized gains and losses associated with these investments are included in other comprehensive income (net of tax) within the Consolidated Statements of Comprehensive Income. The fair value of these marketable securities is classified within Level 2 of the fair value hierarchy, as these securities are measured using quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable. Such valuations are determined by a third-party pricing service. For the years ended December 31, 2018, 2017 and 2016, the Company recorded unrealized losses of $0.7 million, unrealized gains of $1.2 million and unrealized losses of $0.9 million on marketable securities, respectively. For the years ended December 31, 2018, 2017 and 2016, the Company received total proceeds, less the amount of interest received, of $9.0 million, $28.5 million and $28.1 million, respectively, from sales of available-for-sale municipal bonds. These sales resulted in realized losses of $0.2 million, less than $0.1 million and $0.2 million for the years ended December 31, 2018, 2017, and 2016 respectively. Such losses were recorded in “Other income-Investment and interest” in the Consolidated Statements of Comprehensive Income. The basis for the sale of these securities was the specific identification of each bond sold during the period. The investments under the funded deferred compensation plan are accounted for as trading securities and unrealized gains or losses are included in earnings. The fair value of these investments are determined based on quoted market prices (Level 1). The following tables provide fair value measurement information for the Company’s marketable securities and deferred compensation fund investment assets as of December 31, 2018 and 2017: As of December 31, 2018 Fair Value Measurement Using: Carrying Total Fair Quoted Significant Significant (in thousands) Financial Assets: Marketable securities Municipal bonds — available-for-sale $ 76,362 $ 76,362 $ — $ 76,362 $ — Deferred compensation fund Money Market 1 2,529 2,529 — 2,529 — Balanced and Lifestyle 8,265 8,265 8,265 — — Large Cap Growth 8,195 8,195 8,195 — — Small Cap Growth 3,217 3,217 3,217 — — Fixed Income 3,432 3,432 3,432 — — International 1,485 1,485 1,485 — — Mid Cap Growth 1,990 1,990 1,990 — — Deferred compensation fund $ 29,113 $ 29,113 $ 26,584 $ 2,529 $ — As of December 31, 2017 Fair Value Measurement Using: Carrying Total Fair Quoted Significant Significant (in thousands) Financial Assets: Marketable securities Municipal bonds — available-for-sale $ 73,221 $ 73,221 $ — $ 73,221 $ — Deferred compensation fund Money Market 1 $ 2,720 $ 2,720 $ — $ 2,720 $ — Balanced and Lifestyle 8,523 8,523 8,523 — — Large Cap Growth 7,802 7,802 7,802 — — Small Cap Value 3,442 3,442 3,442 — — Fixed Income 3,050 3,050 3,050 — — International 1,531 1,531 1,531 — — Mid Cap Growth 1,817 1,817 1,817 — — Deferred compensation fund $ 28,885 $ 28,885 $ 26,165 $ 2,720 $ — 1 The fair value of the money market fund is based on the net asset value (“NAV”) of the shares held by the plan at the end of the period. The money market fund includes short-term United States dollar denominated money-market instruments and the NAV is determined by the custodian of the fund. The money market fund can be redeemed at its NAV at the measurement date, as there are no significant restrictions on the ability to sell this investment. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other-Than-Temporary Impairments (in thousands) December 31, 2018 Marketable securities Municipal bonds — available-for-sale $ 76,162 $ 633 $ (433) $ 76,362 $ — Total debt securities $ 76,162 $ 633 $ (433) $ 76,362 $ — December 31, 2017 Marketable securities Municipal bonds — available-for-sale $ 72,249 $ 1,169 $ (197) $ 73,221 $ — Total debt securities $ 72,249 $ 1,169 $ (197) $ 73,221 $ — December 31, 2016 Marketable securities Municipal bonds — available-for-sale $ 68,220 $ 178 $ (668) $ 67,730 $ — Total debt securities $ 68,220 $ 178 $ (668) $ 67,730 $ — The following table summarizes the contractual maturities of debt securities held at December 31, 2018 and 2017, which are classified as marketable securities in the Consolidated Balance Sheets: Municipal Bonds — Available-for-Sale December 31, 2018 2017 (in thousands) Contractual maturity: Maturing in one year or less $ 1,645 $ 916 Maturing in second year through fifth year 24,649 15,948 Maturing in sixth year through tenth year 14,769 22,851 Maturing after ten years 35,299 33,506 Total debt securities $ 76,362 $ 73,221

Accounts and Notes Receivable

Accounts and Notes Receivable	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Accounts and Notes Receivable	Note 7— Accounts and Notes Receivable The Company’s accounts and notes receivable balances consisted of the following as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 (in thousands) Short-term Accounts and notes receivable $ 389,047 $ 390,705 Allowance for doubtful accounts (47,209) (11,985) Total net short-term accounts and notes receivable 341,838 378,720 Long-term Notes receivable 53,043 15,476 Allowance for doubtful accounts (10,000) — Total net long-term notes receivable 43,043 15,476 Total net accounts and notes receivable $ 384,881 $ 394,196 The Company makes credit decisions on a case–by–case basis after reviewing a number of qualitative and quantitative factors related to the specific client as well as current industry variables that may impact that client. There are a variety of factors that impact a client’s ability to pay in accordance with the Company’s service agreements. These factors include, but are not limited to, fluctuating census numbers, litigation costs and the client’s participation in programs funded by federal and state governmental agencies. Deviations in the timing or amounts of reimbursements under those programs can impact the client’s cash flows and their ability to make timely payments. However, the client's obligation to pay the Company in accordance with the service agreements are not contingent upon the client’s cash flows. Notwithstanding the Company’s efforts to minimize its credit risk exposure, the aforementioned factors, as well as other factors that impact client cash flows or ability to make timely payments, could have an indirect, yet material adverse effect on the Company’s results of operations and financial condition. The Company’s net current accounts and notes receivable balance decreased from December 31, 2017. Fluctuations in net accounts and notes receivable are generally attributable to a variety of factors including, but not limited to, the timing of cash receipts from customers and the inception, transition, modification or termination of client relationships. However, the Company offset its accounts and notes receivable with an increased allow ance for doubtful accounts in 2018 related to multiple corporate restructurings of privately-held, multi-facility operators that occurred during 2018 that resulted in increased expense compared to our historical experience. In addition, the Company converted approximately $24.8 million of accounts receivable to long-term notes receivable. Additionally, in 2018 the Company finalized an agreement for a long-term promissory note receivable related to the previously mentioned corporate restructurings. The promissory note receivable was $10.0 million, net of reserve which has been classified as a long-term notes receivable on the Company's balance sheet for the year ended December 31, 2018.

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Allowance for Doubtful Accounts	Note 8 — Allowance for Doubtful Accounts The allowance for doubtful accounts is established when the Company determines that it is probable that receivables have been impaired and the Company can reasonably estimate the amount of the losses. The related provision for bad debts is charged to costs of services provided in the Company’s Consolidated Statements of Comprehensive Income. The allowance for doubtful accounts is evaluated based on the Company’s ongoing review of accounts and notes receivable and is inherently subjective as it requires estimates susceptible to significant revision as more information becomes available. The Company has had varying collections experience with respect to its accounts and notes receivable. The Company has sometimes extended the period of payment for certain clients beyond contractual terms. Such clients include those who have terminated service agreements and slow payers experiencing financial difficulties. In order to provide for these collection problems and the general risk associated with the granting of credit terms, the Company recorded the following bad debt provisions (in an Allowance for Doubtful Accounts): Year Ended December 31, 2018 2017 2016 (in thousands) Bad debt provision $ 51,387 $ 6,250 $ 4,629 The increase to the bad debt provision for 2018 related to multiple corporate restructurings of privately-held, multi-facility operators that occurred during 2018 that resulted in increased expense compared to the Company's historical experience. In making the Company’s credit evaluations, in addition to analyzing and anticipating, where possible, the specific cases described above, management considers the general collection risk associated with trends in the long-term care industry. The Company establishes credit limits, performs ongoing credit evaluations and monitors accounts to minimize the risk of loss. Despite the Company’s efforts to minimize credit risk exposure, clients could be adversely affected if future industry trends change in such a manner as to negatively impact their cash flows. If the Company’s clients experience a negative impact on their cash flows, it could have a material adverse effect on the Company’s results of operations and financial condition. Impaired Notes Receivable The Company evaluates its notes receivable for impairment quarterly and on an individual client basis. Notes receivable are generally evaluated for impairment when the respective clients are in bankruptcy, are subject to collections activity or are slow payers that are experiencing financial difficulties. In the event that the evaluation results in a determination that a note receivable is impaired, it is valued at the present value of expected future cash flows or at the market value of related collateral. The increase in impaired notes receivable and the related reserve during the year ended December 31, 2018 related to the corporate restructuring of a privately held, multi-state operator that occurred during 2018. A result of the corporate restructuring was a long-term promissory note receivable of $10.0 million, net of reserve. Summary schedules of impaired notes receivable, and the related reserve, for the years ended December 31, 2018, 2017 and 2016 are as follows: Impaired Notes Receivable Year Ended December 31, Balance Beginning of Year Additions Deductions Balance End of Year Average Outstanding Balance (in thousands) 2018 $ 6,854 $ 23,382 $ 4,532 $ 25,704 $ 15,448 2017 $ 5,685 $ 1,169 $ — $ 6,854 $ 6,270 2016 $ 6,471 $ — $ 786 $ 5,685 $ 6,078 Reserve for Impaired Notes Receivable Year Ended December 31, Balance Beginning of Year Additions Deductions Balance End of Year (in thousands) 2018 $ 2,884 $ 12,526 $ 1,938 $ 13,472 2017 $ 2,419 $ 465 $ — $ 2,884 2016 $ 2,139 $ 280 $ — $ 2,419

Lease Commitments

Lease Commitments	12 Months Ended
	Dec. 31, 2018
Leases, Operating [Abstract]
Lease Commitments	Note 9 — Lease Commitments The Company leases office facilities, equipment and vehicles under operating leases expiring on various dates through 2025. Certain office leases contain renewal options. The following is a schedule by calendar year of future minimum lease payments under operating leases that have remaining terms as of December 31, 2018: Period/Year Operating Leases (in thousands) 2019 $ 3,203 2020 2,799 2021 1,097 2022 677 2023 677 Thereafter 677 Total minimum lease payments $ 9,130 Total expense for all operating leases for the years ended December 31, 2018, 2017 and 2016 was as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Operating lease expense $ 4,039 $ 3,833 $ 2,615

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Note 10— Share-Based Compensation A summary of stock-based compensation expense and related tax benefits for the years ended December 31, 2018, 2017 and 2016 is as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Stock options $ 2,989 $ 3,740 $ 3,193 Restricted stock units and restricted stock 2,591 1,205 550 Employee Stock Purchase Plan 320 1,040 509 Total pre-tax stock-based compensation expense charged against income 1 $ 5,900 $ 5,985 $ 4,252 Total recognized tax benefit related to stock-based compensation $ 1,480 $ 5,709 $ 2,773 1 Stock-based compensation expense is recorded in the selling, general and administrative caption in the Consolidated Statements of Comprehensive Income. As of December 31, 2018 and 2017, the unrecognized compensation cost related to unvested stock options and awards was $14.0 million and $11.4 million, respectively. The weighted average period over which these awards will vest was approximately 2.5 years as of December 31, 2018 and 2.7 years as of December 31, 2017. 2012 Equity Incentive Plan The Company’s 2012 Equity Incentive Plan (the “Plan”) provides that current or prospective officers, employees, non-employee directors and advisors can receive share-based awards such as stock options, restricted stock, restricted stock units and other stock awards. The Plan seeks to promote the highest level of performance by providing an economic interest in the long-term success of the Company. As of December 31, 2018, 2.9 million shares of Common Stock were reserved for issuance under the Plan, including 0.5 million shares available for future grant. No stock award will have a term in excess of ten years. All awards granted under the Plan become vested and exercisable ratably over a five The Nominating, Compensation and Stock Option Committee of the Board of Directors is responsible for determining the individuals who will be granted stock awards, the number of stock awards each individual will receive and the terms of the grants in accordance with the Plan. Stock Options A summary of stock options outstanding under the Plan as of December 31, 2018 and changes during 2018 is as follows: Number of Shares Weighted Average Exercise Price (in thousands) December 31, 2017 2,374 $ 29.22 Granted 169 $ 52.06 Exercised (351) $ 25.12 Forfeited (65) $ 35.50 Expired (6) $ 27.10 December 31, 2018 2,121 $ 31.53 The weighted average grant-date fair value of stock options granted during the years ended 2018, 2017 and 2016 were $10.48, $8.52 and $7.46 per common share, respectively. The total intrinsic value of options exercised during the years ended 2018, 2017 and 2016 were $7.8 million, $19.5 million and $4.9 million, respectively. The total fair value of options vested during the years ended 2018, 2017 and 2016 were $3.7 million, $3.2 million and $2.8 million, respectively. For the years ended December 31, 2018 and 2017 the tax benefit realized from stock options exercised were $1.0 million and $5.3 million, respectively. The fair value of the stock option awards granted during 2018, 2017 and 2016 were estimated on the dates of grant using the Black-Scholes option valuation model and the following assumptions: Year Ended December 31, 2018 2017 2016 Risk-free interest rate 2.1 % 2.0 % 2.0 % Weighted average expected life 5.8 years 5.8 years 5.8 years Expected volatility 21.5 % 25.1 % 26.0 % Dividend yield 1.5 % 1.9 % 2.0 % The following table summarizes other information about the stock options at December 31, 2018: December 31, 2018 (amounts in thousands, except per share data) Outstanding: Aggregate intrinsic value $ 20,351 Weighted average remaining contractual life 5.9 years Exercisable: Number of options 1,051 Weighted average exercise price $ 25.20 Aggregate intrinsic value $ 15,750 Weighted average remaining contractual life 4.5 years Restricted Stock Units and Restricted Stock The fair value of outstanding restricted stock units and restricted stock was determined based on the market price of the shares on the date of grant. For both the years ended December 31, 2018 and 2017, the Company granted 0.1 million restricted stock units with a weighted average grant date fair value of $52.06 and $40.16 per unit, respectively. There were no restricted stock units granted during 2016. For the years ended December 31, 2018 and 2017, the Company did not grant restricted stock. For the year ended December 31, 2016 the Company granted less than 0.1 million shares of restricted stock, with a weighted average grant date fair value of $34.14 per share. A summary of the outstanding restricted stock units and restricted stock as of December 31, 2018 and changes during 2018 is as follows: Restricted Stock Units and Restricted Stock Number Weighted Average Grant Date Fair Value (in thousands) December 31, 2017 145 $ 37.07 Granted 139 $ 52.06 Vested (36) $ 35.79 Forfeited (7) $ 52.06 December 31, 2018 241 $ 45.47 The weighted average remaining vesting period for the unvested restricted stock units and restricted stock is 3.3 years. The weighted average grant-date fair values and total fair values of restricted stock units and restricted stock vested during 2018, 2017 and 2016 are as follows: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Weighted average grant-date fair value of restricted stock units and restricted stock granted $ 52.06 $ 40.16 $ 34.14 Total fair value of restricted stock units and restricted stock vested $ 1,822 $ 690 $ 311 Fair value is determined based on the market price of the shares on the date of grant. The weighted average remaining vesting period for the unvested restricted stock is 3.3 years. Employee Stock Purchase Plan The Company's Employee Stock Purchase Plan ("ESPP") is currently available through 2021 to all eligible employees. All full-time and part-time employees who work an average of 20 hours per week and have completed two years of continuous service with the Company are eligible to participate. Annual offerings commence and terminate on the respective year’s first and last calendar day. Under the ESPP, the Company is authorized to issue up to 4.1 million shares of Common Stock to its employees. Pursuant to such authorization, there are 2.2 million shares available for future grant at December 31, 2018. Under the terms of the ESPP, participants may contribute through payroll deductions up to $21,250 (85% of IRS limitation) of their compensation toward the purchase of the Company’s Common Stock. No employee may purchase Common Stock which exceeds $25,000 in fair market value (determined on the option date) for each calendar year. The option price per share is equal to the lower of 85% of the fair market price on the first day of the offering period, or 85% of the fair market price on the last day of the offering period. The following table summarizes information about the Company’s ESPP annual offerings for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Common shares purchased 53 54 53 Per common share purchase price $ 34.15 $ 33.29 $ 29.64 Deferred Compensation Plan The Company offers a Supplemental Executive Retirement Plan (“SERP”) for certain key executives and employees. The SERP is not qualified under Section 401 of the Internal Revenue Code. The SERP allows participants to defer up to 25% of their earned income on a pre-tax basis and as of the last day of each plan year, each participant will be credited with a 25% match of up to 15% of their deferral in the form of Company Common Stock based on the then-current market value. SERP participants fully vest in the Company’s matching contribution three years from the first day of the initial year of participation. The income deferred and the matching contributions are unsecured and subject to the claims of the Company’s general creditors. Under the SERP, the Company is authorized to issue up to 1.0 million shares of Common Stock to its employees. Pursuant to such authorization, there are 0.4 million shares available for future grant at December 31, 2018. At the time of issuance, such shares were accounted for at cost as treasury stock. At December 31, 2018, approximately 0.3 million of such shares are vested and remain in the respective active participants’ accounts with the trustee. The following table summarizes information about the SERP for the plan years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands) SERP expense 1 $ 547 $ 503 $ 511 Treasury shares issued to fund SERP expense 2 14 9 13 SERP trust account balance at December 31 3 $ 39,766 $ 42,467 $ 34,599 Unrealized gain (loss) recorded in SERP liability account $ (1,469) $ 4,534 $ 1,495 1 Both the SERP match and the deferrals are included in the selling, general and administrative caption in the Consolidated Statements of Comprehensive Income. 2 Shares related to the SERP match for each year are funded at the beginning of the subsequent year. 3 SERP trust account investments are recorded at their fair value which is based on quoted market prices. Differences between such amounts in the table above and the deferred compensation funding asset reported on the Consolidated Balance Sheets represent the value of Company Common Stock held in the Plan participants’ trust accounts and reported by the Company as treasury stock in the Consolidated Balance Sheets.

Other Employee Benefit Plans

Other Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Other Employee Benefit Plans	Note 11— Other Employee Benefit Plans Retirement Savings Plan Since October 1, 1999, the Company has had a retirement savings plan for eligible employees (the “RSP”) under Section 401(k) of the Internal Revenue Code. The RSP allows eligible employees to contribute up to 15% of their eligible compensation on a pre-tax basis. There is no match by the Company.

Dividends

Dividends	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Dividends	Note 12— Dividends The Company has paid regular quarterly cash dividends since the second quarter of 2003. During 2018, the Company paid regular quarterly cash dividends totaling $57.2 million as detailed below: Quarter Ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 (in thousands, except per share amounts) Cash dividends paid per common share $ 0.19125 $ 0.19250 $ 0.19375 $ 0.19500 Total cash dividends paid $ 14,149 $ 14,249 $ 14,350 $ 14,453 Record date February 16, 2018 May 25, 2018 August 24, 2018 November 23, 2018 Payment date March 23, 2018 June 29, 2018 September 28, 2018 December 28, 2018 Additionally, on February 5, 2019, the Company’s Board of Directors declared a regular quarterly cash dividend of $0.19625 per common share, which will be paid on March 22, 2019 to shareholders of record as of the close of business on February 15, 2019. Cash dividends declared on the Company’s outstanding weighted average number of basic common shares for the years ended December 31, 2018, 2017 and 2016 were as follows: Year Ended December 31, 2018 2017 2016 Cash dividends declared per common share $ 0.77750 $ 0.75750 $ 0.73750

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 13— Income Taxes The following table summarizes the provision for income taxes: Year Ended December 31, 2018 2017 2016 (in thousands) Current: Federal $ 23,407 $ 35,673 $ 33,032 State 5,992 7,179 6,958 29,399 42,852 39,990 Deferred: Federal (9,526) 2,924 2,163 State (3,487) (1,037) 838 (13,013) 1,887 3,001 Tax provision $ 16,386 $ 44,739 $ 42,991 Deferred income taxes are recorded using the asset and liability method. Deferred tax assets and liabilities are determined based on differences between the financial reporting and income tax basis of assets and liabilities. On December 22, 2017, the Tax Cuts and Jobs Act was signed into law, enacting significant changes to corporate tax rates, as well as business-related exclusions, deductions and credits. The primary impact to the Company was the decrease in the U.S. federal corporate income tax rate from 35% to 21%. Accordingly, during the fourth quarter 2017, the Company recognized the effects of the changes in the tax law and rates on its deferred tax balances. The net result of the remeasurement was an approximately $4.5 million decrease to the Company’s net deferred tax assets balance and a corresponding increase to the Company’s provision for income taxes for the year ended December 31, 2017. Significant components of the Company’s federal and state deferred tax asset and liability balances are as follows: Year Ended December 31, 2018 2017 (in thousands) Deferred tax assets: Allowance for doubtful accounts $ 14,599 $ 3,109 Deferred compensation 7,350 6,601 Accrued insurance claims 3,715 3,665 Non-deductible reserves 336 567 Amortization of intangibles 24 162 Other 1,730 662 27,754 14,766 Deferred tax liabilities: Expensing of housekeeping supplies (4,375) (4,678) Depreciation of property and equipment (1,913) (1,745) Other (914) (845) (7,202) (7,268) Net deferred tax assets $ 20,552 $ 7,498 Realization of the Company’s deferred tax assets is dependent upon future earnings in specific tax jurisdictions, the timing and amount of which are uncertain. Management assesses the Company’s income tax positions and records tax benefits for all years subject to examination based upon an evaluation of the facts, circumstances, and information available at the reporting dates, which include historical operating results and expectations of future earnings. As such, management believes it is more likely than not that the deferred tax assets recorded will be realized to reduce future income taxes and therefore no valuation allowances are necessary. The table below provides a reconciliation between the tax expense computed by applying the statutory federal income tax rate to income before income taxes and the provision for income taxes: Year Ended December 31, 2018 2017 2016 (in thousands) Income tax expense computed at statutory rate $ 20,981 $ 46,538 $ 42,136 Increases (decreases) resulting from: State income taxes, net of federal tax benefit 1,936 3,661 5,064 Federal jobs credits (5,006) (4,193) (4,550) Tax exempt interest (384) (568) (457) Stock-based compensation (1,179) (4,632) 653 United States Tax Reform - remeasurement of deferred taxes — 3,719 — Other, net 38 214 145 Income tax expense $ 16,386 $ 44,739 $ 42,991

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transactions	Note 14—Related Party Transactions For the year ended December 31, 2018, the Company did not have any related party transactions. For the years ended December 31, 2017 and 2016, a director was a member of a law firm which was retained by the Company. The fees paid by the Company to such firm did not exceed $120,000 in any period. Additionally, such fees did not exceed, in any period, 5% of such firm’s revenues or the Company’s revenues.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	Reportable Operating Segments The Company manages and evaluates its operations in two reportable segments: Housekeeping (housekeeping, laundry, linen and other services) and Dietary (dietary department services). Although both segments serve the same client base and share many operational similarities, they are managed separately due to distinct differences in the type of services provided, as well as the specialized expertise required of the professional management personnel responsible for delivering each segment’s services. Such services are rendered pursuant to discrete service agreements, specific to each reportable segment. The Company’s accounting policies for the segments are generally the same as described in the Company’s significant accounting policies. Differences between the reportable segments’ operating results and other disclosed data and the information in the Consolidated Financial Statements relate primarily to corporate level transactions and recording of transactions at the reportable segment level using other than generally accepted accounting principles. There are certain inventories and supplies that are primarily expensed when incurred within the operating segments, while they are capitalized in the Consolidated Financial Statements. In addition, most corporate expenses such as corporate salary and benefit costs, certain legal costs, information technology costs, depreciation, amortization of finite-lived intangible assets, share based compensation costs and other corporate-specific costs, are not allocated to the operating segments. There are also allocations for workers’ compensation and general liability expense within the operating segments that differ from the actual expense recorded by the Company under U.S. GAAP. Segment amounts disclosed are prior to elimination entries made in consolidation. All revenues and net income are earned in the United States. Year Ended December 31, 2018 2017 2016 (in thousands) Revenues 1 Housekeeping services $ 973,826 $ 979,610 $ 957,148 Dietary services 1,034,995 886,521 605,514 Corporate and eliminations $ — $ — $ — Consolidated $ 2,008,821 $ 1,866,131 $ 1,562,662 Income before income taxes Housekeeping services 2 $ 108,305 $ 95,505 $ 90,756 Dietary services 60,562 46,008 34,641 Corporate and eliminations 3 (68,957) (8,548) (5,010) Consolidated $ 99,910 $ 132,965 $ 120,387 Depreciation and amortization Housekeeping services $ 6,315 $ 6,547 $ 6,535 Dietary services 2,433 1,813 439 Corporate and eliminations 524 526 522 Consolidated $ 9,272 $ 8,886 $ 7,496 Total assets Housekeeping services $ 291,117 $ 304,303 $ 266,464 Dietary services 235,183 242,874 127,187 Corporate and eliminations 4 166,303 128,826 134,795 Consolidated $ 692,603 $ 676,003 $ 528,446 Capital expenditures Housekeeping services $ 3,996 $ 4,287 $ 4,612 Dietary services 690 663 410 Corporate and eliminations 254 447 420 Consolidated $ 4,940 $ 5,397 $ 5,442 1 F or the years ended December 31, 2018 and 2017, both the Housekeeping and Dietary segments earned revenue from several significant customers, including Genesis. For the years ended December 31, 2018 and 2017, Genesis accounted for $386.7 million or 19.3% and $327.5 million or 17.5% of the Company's consolidated revenues, respectively. 2 Includes the impact of the revenues earned and expenses incurred from the Voluntary Benefits Program of the Company's wholly-owned captive insurance subsidiary. 3 Represents primarily corp orate office cost and related overhead, recording of certain inventories and supplies and workers compensation costs at the reportable segment level which use accounting methods that differ from those used at the corporate level, as well as consolidated subsidiaries’ operating expenses that are not allocated to the reportable segments, net of investment and interest income. 4 Primarily consists of cash and cash equivalents, marketable securities, deferred income taxes and other current and noncurrent assets.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Note 16— Earnings Per Common Share Basic and diluted earnings per common share are computed by dividing net income by the weighted-average number of basic and diluted common shares outstanding, respectively. The weighted-average number of diluted common shares includes the impact of dilutive securities, including outstanding stock options and unvested restricted stock and restricted stock units. The table below reconciles the weighted-average basic and diluted common shares outstanding for 2018, 2017 and 2016: Year Ended December 31, 2018 2018 2017 2016 (in thousands) Weighted average number of common shares outstanding - basic 74,002 73,355 72,754 Effect of dilutive securities 1 610 993 720 Weighted average number of common shares outstanding - diluted 74,612 74,348 73,474 1 Certain outstanding equity awards are anti-dilutive and were therefore excluded from the calculation of the weighted average number of diluted common shares outstanding.

Contractual Obligations and Oth

Contractual Obligations and Other Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Contractual Obligations and Other Contingencies	Note 17—Contractual Obligations and Other Contingencies Line of Credit As of December 31, 2018, the Compa ny had a $475 million bank line of credit on which to draw for general corporate purposes. Amounts drawn under the line of credit are payable upon demand and generally bear interest at a floating rate, based on the Company's leverage ratio, and starting at LIBOR plus 115 basis points (or if LIBOR becomes unavailable, the higher of the Overnight Bank Funding Rate, plus 50 basis points and the Prime Rate). At December 31, 2018, there were $30.0 million in borrowings under the line of credit. The line of credit requires the Company to satisfy two financial covenants, with which the Company is in compliance as of December 31, 2018 and expects to remain in compliance. The line of credit expires on December 21, 2023. At December 31, 2018, the Company also had outstanding $65.9 million in irrevocable standby letters of credit, which relate to payment obligations under the Company's insurance programs. In connection with the issuance of the letters of credit, the amount available under the line of credit was further reduced by $65.9 million at December 31, 2018. On January 2, 2019, the letters of credit were amended and decreased the outstanding amounts to $62.7 million. The letters of credit expire on January 2, 2020. Tax Jurisdictions and Matters The Company provides services throughout the continental United States and is subject to numerous state and local taxing jurisdictions. In the ordinary course of business, a jurisdiction may contest the Company’s reporting positions with respect to the application of its tax code to the Company’s services, which could result in additional tax liabilities. The Company has tax matters with various taxing authorities. Because of the uncertainties related to both the probable outcomes and amount of probable assessments due, the Company is unable to make a reasonable estimate of a liability. The Company does not expect the resolution of any of these matters, taken individually or in the aggregate, to have a material adverse effect on the consolidated financial position or results of operations based on the Company’s best estimate of the outcomes of such matters. Legal Proceedings The Company is subject to various claims and legal actions in the ordinary course of business. Some of these matters include payroll and employee-related matters and examinations by governmental agencies. As the Company becomes aware of such claims and legal actions, the Company records accruals for any exposures that are probable and estimable. If adverse outcomes of such claims and legal actions are reasonably possible, management assesses materiality and provides financial disclosure, as appropriate. The Company believes it is not a party to, nor are any of its properties the subject of, any pending legal proceeding or governmental examination that would have a material adverse effect on the Company’s consolidated financial condition or liquidity. Government Regulations The Company’s clients are concentrated in the healthcare industry and are primarily providers of long-term care. The revenues of many of the Company’s clients are highly reliant on Medicare, Medicaid and third party payors’ reimbursement funding rates. New legislation or additional changes in existing regulations could directly impact the governmental reimbursement programs in which the clients participate. The full effect of any such programs would not be realized until these laws are fully implemented and government agencies issue applicable regulations or guidance.

Accrued Insurance Claims

Accrued Insurance Claims	12 Months Ended
	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued Insurance Claims	Note 18—Accrued Insurance Claims The Company currently has a Paid Loss Retrospective Insurance Plan for general liability and workers’ compensation insurance, which comprise approximately 31.6% of the Company’s liabilities at December 31, 2018. Under the Company’s insurance plans for general liability and workers’ compensation, predetermined loss limits are arranged with the Company’s insurance company to limit both per occurrence cash outlay and annual insurance plan cost. The Company’s accounting for this plan utilizes current valuations from a third party actuary, which include assumptions based on data such as historical claims, pay-out experience, demographic factors, industry trends, severity factors, and other actuarial calculations. In the event that the Company’s claims experience and/or industry trends result in an unfavorable change in the assumptions or outcomes, it would have an adverse effect on the Company’s results of operations and financial condition. For general liability and workers’ compensation, the Company records both a reserve for the estimated future cost of claims and related expenses that have been reported but not settled, as well as an estimate of claims incurred but not reported. Such reserves for claims incurred but not reported are developed by a third party actuary through review of the Company’s historical data and open claims.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 19—Subsequent Events The Company evaluated all subsequent events through the date of this Annual Report on Form 10-K. There were no events or transactions occurring during this subsequent reporting period which require recognition or additional disclosure in these financial statements.

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	The following tables summarize the unaudited quarterly financial data for the last two fiscal years. First Quarter Second Quarter Third Quarter Fourth Quarter (in thousands, except per share amounts) 2018 Revenues $ 501,810 $ 503,732 $ 506,871 $ 496,408 Operating costs and expenses $ 503,681 $ 471,736 $ 475,916 $ 457,251 (Loss) income before income taxes $ (1,395) $ 33,316 $ 32,982 $ 35,007 Net income $ 72 $ 25,814 $ 26,086 $ 31,552 Basic earnings per common share $ 0.00 $ 0.35 $ 0.35 $ 0.43 Diluted earnings per common share $ 0.00 $ 0.35 $ 0.35 $ 0.42 Cash dividends declared per common share $ 0.19250 $ 0.19375 $ 0.19500 $ 0.19625 2017 Revenues $ 404,490 $ 470,876 $ 491,355 $ 499,410 Operating costs and expenses $ 373,780 $ 439,313 $ 459,864 $ 466,285 Income before income taxes $ 32,279 $ 33,078 $ 32,930 $ 34,678 Net income $ 22,017 $ 22,551 $ 23,472 $ 20,186 Basic earnings per common share $ 0.30 $ 0.31 $ 0.32 $ 0.27 Diluted earnings per common share $ 0.30 $ 0.30 $ 0.31 $ 0.27 Cash dividends declared per common share $ 0.18750 $ 0.18875 $ 0.19000 $ 0.19125

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts and Reserves	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts and Reserves	Schedule II — Valuation and Qualifying Accounts and Reserves Additions Description Beginning Balance Charged to Costs and Expenses Charged to Other Accounts Deductions Ending Balance (in thousands) 2018 Allowance for Doubtful Accounts $ 11,985 $ 51,387 $ — $ 6,163 $ 57,209 2017 Allowance for Doubtful Accounts $ 6,911 $ 6,250 $ — $ 1,176 $ 11,985 2016 Allowance for Doubtful Accounts $ 4,608 $ 4,629 $ — $ 2,326 $ 6,911

Description of Business and S_2

Description of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Nature of Operations	The Company provides services primarily pursuant to full service agreements with its clients. In such agreements, the Company is responsible for the day-to-day management of employees located at the clients’ facilities. The Company also provides services on the basis of management-only agreements for a limited number of clients. The agreements with clients typically provide for a renewable one year service term, cancelable by either party upon 30 to 90 days’ notice after an initial period of 60 to 120 days. The Company is organized into two reportable segments; housekeeping, laundry, linen and other services (“Housekeeping”), and dietary department services (“Dietary”). Housekeeping consists of managing the clients’ housekeeping departments, which are principally responsible for the cleaning, disinfecting and sanitizing of resident rooms and common areas of a client’s facility, as well as the laundering and processing of the bed linens, uniforms, resident personal clothing and other assorted linen items utilized at a client facility. Dietary consists of managing the clients’ dietary departments, which are principally responsible for food purchasing, meal preparation and dietitian professional services, which includes the development of menus that meet residents’ dietary needs.
Use of Estimates in Financial Statements	Use of Estimates in Financial StatementsIn preparing financial statements in conformity with U.S. GAAP, estimates and assumptions are made that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Significant estimates are used in determining, but are not limited to, the Company’s allowance for doubtful accounts, accrued insurance claims, valuations, deferred taxes and reviews for potential impairment. The estimates are based upon various factors including current and historical trends, as well as other pertinent industry and regulatory authority information. Management regularly evaluates this information to determine if it is necessary to update the basis for its estimates and to adjust for known changes.
Principles of Consolidation	Principles of ConsolidationThe accompanying consolidated financial statements include the accounts of Healthcare Services Group, Inc. and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.
Fair Value of Financial Instruments	The Company determines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company utilizes valuation techniques that maximize the use of observable inputs (Levels 1 and 2) and minimize the use of unobservable inputs (Level 3) within the fair value hierarchy. Assets and liabilities are classified within the fair value hierarchy based on the lowest level (least observable) input that is significant to the measurement in its entirety. While unobservable inputs reflect the Company's market assumptions. Preference is given to observable inputs. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets; Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable; and Level 3 – Significant inputs to the valuation model are unobservable
Cash and Cash Equivalents	Cash and cash equivalents are held in U.S. financial institutions or in custodial accounts with U.S. financial institutions. Cash equivalents are defined as short-term, highly liquid investments with a maturity of three months or less at time of purchase that are readily convertible into cash and have insignificant interest rate risk.
Investments in Marketable Securities	Marketable securities are defined as fixed income investments which are highly liquid and can be readily purchased or sold through established markets. As of December 31, 2018 and 2017, the Company had marketable securities of $76.4 million and $73.2 million, respectively, which were comprised primarily of tax-exempt municipal bonds. These investments are accounted for as available-for-sale securities and are reported at fair value on the balance sheet. For the years ended December 31, 2018 and 2017, $0.8 million of unrealized losses and $1.1 million of unrealized gains related to these investments were recorded in other comprehensive income, respectively. Unrealized gains and losses are recorded net of income taxes. These assets are available for future needs under the Company’s self-insurance programs and are held by the Company's wholly-owned captive subsidiary as required by state insurance regulations. The Company’s investment policy is intended to manage the assets to achieve the goals of preserving principal, maintaining adequate liquidity at all times, and maximizing returns subject to investment guidelines. The investment policy limits investment to certain types of instruments issued by institutions primarily with investment grade credit ratings and places restrictions on concentration by type and issuer.
Inventories and Supplies	Inventories and supplies include housekeeping, linen and laundry supplies, as well as food provisions and supplies. Non-linen inventories and supplies are stated at cost to approximate a first-in, first-out (FIFO) basis. Linen supplies are amortized on a straight-line basis over their estimated useful life of 24 months.
Property and Equipment	Property and equipment are stated at cost, net of accumulated depreciation. Additions, renewals and improvements are capitalized, while maintenance and repair costs are expensed when incurred. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the respective accounts and any resulting gain or loss is included in income. Depreciation is recorded using the straight-line method over the following estimated useful lives: Housekeeping and Dietary equipment — 5 to 7 years; computer hardware and software — 3 to 7 years; and other, consisting of furniture and fixtures, leasehold improvements and vehicles — 5 to 10 years.
Revenue Recognition	The Company recognizes revenue from service agreements with customers when or as the promised goods and services are provided to customers. Revenues are reported net of sales taxes that are collected from customers and remitted to taxing authorities.The guidance under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification subtopic 606 Revenue from Contracts with Customers (“ASC 606”) became effective and was adopted by the Company as of January 1, 2018, by applying the modified retrospective method for contracts that were not completed as of January 1, 2018. The standard requires the Company to recognize revenue as the promised goods and services within the terms of the Company’s contracts are performed and satisfied. The amount of revenue which the Company recognizes is based on the consideration which the Company expects to be entitled to in exchange for contracted promised goods and services. The adoption of this standard did not have a material impact to the Company's accounting for revenue earned relating to the Housekeeping and Dietary segments. The Company also did not recognize an opening adjustment to retained earnings as a result of the adoption of the standard.
Income Taxes	The Company uses the asset and liability method of accounting for income taxes. Under this method, income tax expense is recognized for the amount of taxes payable or refundable for the current period. The Company accrues for probable tax obligations as required by facts and circumstances in various regulatory environments. In addition, deferred tax assets and liabilities are recognized for expected future tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. When appropriate, valuation allowances are recorded to reduce deferred tax assets to amounts for which realization is more likely than not. Deferred tax assets and liabilities are more fully described in Note 13— Income Taxes. Uncertain income tax positions taken or expected to be taken in tax returns are reflected within the Company’s financial statements based on a recognition and measurement process. The Company may from time to time be assessed interest or penalties by taxing jurisdictions, although any such assessments historically have been minimal and immaterial to its financial results. When the Company has received an assessment for interest and/or penalties, it will be classified in the financial statements as selling, general and administrative expense. In addition, any interest or penalties relating to recognized uncertain tax positions would also be recorded in selling, general and administrative expense.
Earnings per Common Share	Basic earnings per common share is computed by dividing income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per common share is calculated using the weighted-average number of common shares outstanding and dilutive common shares, such as those issuable upon exercise of stock options and upon the vesting of restricted stock and restricted stock units.
Share-Based Compensation	The Company estimates the fair value of share-based awards on the date of grant using the Black-Scholes valuation model for stock options and using the share price on the date of grant for restricted stock and restricted stock units. The value of the award is recognized ratably as an expense in the Company’s Consolidated Statements of Comprehensive Income over the requisite service periods, with adjustments made for forfeitures as they occur.
Advertising Costs	Advertising costs are expensed when incurred.
Impairment of Long-Lived Assets	The carrying amounts of long-lived assets are periodically reviewed to determine whether current events or circumstances warrant adjustment to such carrying amounts. Any impairment would be measured as the amount that the carrying value of such assets exceeds their fair value, primarily based on estimated undiscounted cash flows. Considerable management judgment is necessary to estimate the fair value of assets. Assets to be disposed of are carried at the lower of their financial statement carrying amount or fair value, less cost to sell.
Identifiable Intangible Assets and Goodwill	Identifiable intangible assets are amortized on a straight-line basis over their respective lives. Goodwill represents the excess of cost over the fair value of net assets of acquired businesses. Management reviews the carrying value of goodwill at least annually during the fourth quarter of each year to assess for impairment, or more often if events or circumstances indicate that the carrying value may exceed its estimated fair value. No impairment loss was recognized on the Company’s intangible assets or goodwill for the years ended December 31, 2018, 2017 or 2016. In 2018, the Company adopted the FASB issued Accounting Standards Update 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 no longer requires the Company to perform a hypothetical purchase price allocation to measure impairment, eliminating step 2 of the goodwill impairment test. Instead, impairment is measured using the difference of the carrying amount to the fair value of goodwill on a reporting unit basis. Additionally in 2018, the Company adopted the FASB issued Accounting Standards Update 2018-15, Intangibles - Goodwill and Other - Internal-Use Software ("ASU 2018-15). ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The results of applying ASU 2018-15 were insignificant and did not have a material impact on the Company's consolidated financial statements. The capitalized implementation costs incurred from adopting ASU 2018-15 are recorded in the prepaid expenses and other assets caption in the Consolidated Balance Sheets.
Treasury Stock	Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as treasury stock. Gains or losses on the subsequent reissuance of shares are credited or charged to additional paid-in capital.
Reclassification	Certain prior period amounts have been reclassified to conform to current year presentation, including the presentation of tax benefit from equity compensation plans in the Consolidated Statements of Cash Flows. The tax benefit from equity compensation plans is now reflected as a component of the change in income taxes payable, as opposed to an offset to stock-based compensation expense. There was no impact to the Company's net cash provided by operating activities as a result of the immaterial correction.
Concentrations of Credit Risk	The financial instruments that are subject to concentrations of credit risk are cash and cash equivalents, marketable securities, deferred compensation funding and accounts and notes receivable. The Company’s marketable securities are fixed income investments which are highly liquid and can be readily purchased or sold through established markets. At December 31, 2018 and 2017, substantially all of the Company’s cash and cash equivalents and marketable securities were held in one large financial institution located in the United States. The Company’s clients are concentrated in the healthcare industry and are primarily providers of long-term care. The revenues of many of the Company’s clients are highly reliant on Medicare, Medicaid and third party payors’ reimbursement funding rates. New legislation or changes in existing regulations could directly impact the governmental reimbursement programs in which the clients participate. As a result, the Company may not know the full effects of such programs until these laws are fully implemented and governmental agencies issue applicable regulations or guidance.
Significant Clients	Although the Company expects to continue its relationships with these clients, there can be no assurance thereof. The loss, individually or in the aggregate, of such clients, or a significant reduction in the revenues the Company receives from such clients, could have a material adverse effect on the Company’s results of operations. In addition, if any of these clients change or alter current payments terms, it could increase the Company’s accounts receivables balance and have a material adverse effect on the Company’s cash flows.
Recent Accounting Pronouncements	In February 2016, the FASB issued ASU 2016-02, Leases ("ASC 842"). ASC 842 requires lessees to recognize assets and liabilities on their balance sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their income statements over the lease term. It will also require disclosures designed to give financial statement users information regarding the amount, timing, and uncertainty of cash flows arising from leases. The guidance is effective for annual reporting periods beginning after December 15, 2018, and interim periods within those years. This guidance may be applied through a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements with certain practical expedients available. Alternatively, this guidance may also be applied at the adoption date by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. ASC 842 provides several optional practical expedients in transition including the ‘package of practical expedients,’ which permits the Company to not reassess under the new standard the Company's prior conclusions about lease identification, lease classification and initial direct costs. ASC 842 also provides the Company the option to, as an accounting policy, not capitalize lease obligations for leases with lease terms of less than 12 months. The Company adopted ASC 842 as of January 1, 2019 using a modified retrospective transition approach which resulted in the capitalization of the Company's existing operating leases as of January 1, 2019 which consisted of office space, vehicles and equipment. The Company elected to adopt ASC 842 using the package of practical expedients mentioned above and elected to not capitalize leases with lease terms of less than 12 months. The lease liability and corresponding right-of-use asset recognized upon adoption of ASU 842 was $11.4 million. The Company does not expect ASC 842 to have a material impact to the Consolidated Statements of Operations however will require additional disclosures pertaining to the Company's lease commitments. The Company did not recognize a cumulative-effect adjustment to the opening balance of retained earnings. In June 2016, the FASB issued ASU No. 2016-13, Credit Losses - Measurement of Credit Losses on Financial Instruments ("ASC 326"). The standard significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The standard is effective for interim and annual reporting periods beginning after December 15, 2019. The Company is currently assessing the impact of adopting this standard on the Company’s financial statements and related disclosures.

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income by Component (Tables)	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income	The following table provides a summary of changes in accumulated other comprehensive income, net of taxes: Unrealized Gains and (Losses) on Available-for Sale-Securities 1 2018 2017 2016 (in thousands) Accumulated other comprehensive income (loss) — beginning balance $ 837 $ (319) $ 543 Other comprehensive (loss) income before reclassifications (844) 1,149 (1,005) Losses reclassified from other comprehensive income 2 165 7 143 Net current period other comprehensive (loss) income 3 (679) 1,156 (862) Accumulated other comprehensive income (loss) — ending balance $ 158 $ 837 $ (319) 1 All amounts are net of tax. 2 Realized losses were recorded pre-tax under “Other income, net - Investment and interest” in our Consolidated Statements of Comprehensive Income. For the years ended December 31, 2018, 2017 and 2016 the Company recorded $0.2 million, less than $0.1 million and $0.2 million of realized losses from the sale of available-for-sale securities, respectively. Refer to Note 6—Fair Value Measurements herein for further information. 3 For the years ended December 31, 2018 and 2016, the changes in other comprehensive income were net of a tax benefit of $0.1 million and $0.5 million, respectively. For the year ended December 31, 2017 the changes in other comprehensive income were net of a tax expense of $0.3 million.
Reclassification out of Accumulated Other Comprehensive Income	Amounts Reclassified from Accumulated Other Comprehensive Income 2018 2017 2016 For the Year Ended December 31, (in thousands) Losses from the sale of available-for-sale securities $ 197 $ 11 $ 222 Tax benefit (32) (4) (79) Net loss reclassified from accumulated other comprehensive income $ 165 $ 7 $ 143

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	The following table sets forth the amounts of property and equipment by each class of depreciable asset as of December 31, 2018 and December 31, 2017: December 31, 2018 December 31, 2017 (in thousands) Housekeeping and Dietary equipment $ 22,596 $ 22,349 Computer hardware and software 12,114 12,665 Other 1 920 990 Total property and equipment, at cost 35,630 36,004 Less accumulated depreciation 22,730 22,495 Total property and equipment, net $ 12,900 $ 13,509

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated Amortization Expense For Intangibles Subject To Amortization	The following table sets forth the estimated amortization expense for intangibles subject to amortization for the next five years and thereafter: Period/Year Total Amortization Expense (in thousands) 2019 $ 4,165 2020 $ 4,165 2021 $ 4,165 2022 $ 4,165 2023 $ 3,168 Thereafter $ 6,690

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following tables provide fair value measurement information for the Company’s marketable securities and deferred compensation fund investment assets as of December 31, 2018 and 2017: As of December 31, 2018 Fair Value Measurement Using: Carrying Total Fair Quoted Significant Significant (in thousands) Financial Assets: Marketable securities Municipal bonds — available-for-sale $ 76,362 $ 76,362 $ — $ 76,362 $ — Deferred compensation fund Money Market 1 2,529 2,529 — 2,529 — Balanced and Lifestyle 8,265 8,265 8,265 — — Large Cap Growth 8,195 8,195 8,195 — — Small Cap Growth 3,217 3,217 3,217 — — Fixed Income 3,432 3,432 3,432 — — International 1,485 1,485 1,485 — — Mid Cap Growth 1,990 1,990 1,990 — — Deferred compensation fund $ 29,113 $ 29,113 $ 26,584 $ 2,529 $ — As of December 31, 2017 Fair Value Measurement Using: Carrying Total Fair Quoted Significant Significant (in thousands) Financial Assets: Marketable securities Municipal bonds — available-for-sale $ 73,221 $ 73,221 $ — $ 73,221 $ — Deferred compensation fund Money Market 1 $ 2,720 $ 2,720 $ — $ 2,720 $ — Balanced and Lifestyle 8,523 8,523 8,523 — — Large Cap Growth 7,802 7,802 7,802 — — Small Cap Value 3,442 3,442 3,442 — — Fixed Income 3,050 3,050 3,050 — — International 1,531 1,531 1,531 — — Mid Cap Growth 1,817 1,817 1,817 — — Deferred compensation fund $ 28,885 $ 28,885 $ 26,165 $ 2,720 $ — 1 The fair value of the money market fund is based on the net asset value (“NAV”) of the shares held by the plan at the end of the period. The money market fund includes short-term United States dollar denominated money-market instruments and the NAV is determined by the custodian of the fund. The money market fund can be redeemed at its NAV at the measurement date, as there are no significant restrictions on the ability to sell this investment.
Marketable Debt Securities	Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other-Than-Temporary Impairments (in thousands) December 31, 2018 Marketable securities Municipal bonds — available-for-sale $ 76,162 $ 633 $ (433) $ 76,362 $ — Total debt securities $ 76,162 $ 633 $ (433) $ 76,362 $ — December 31, 2017 Marketable securities Municipal bonds — available-for-sale $ 72,249 $ 1,169 $ (197) $ 73,221 $ — Total debt securities $ 72,249 $ 1,169 $ (197) $ 73,221 $ — December 31, 2016 Marketable securities Municipal bonds — available-for-sale $ 68,220 $ 178 $ (668) $ 67,730 $ — Total debt securities $ 68,220 $ 178 $ (668) $ 67,730 $ —
Contractual Maturities of Available For Sale Investments	The following table summarizes the contractual maturities of debt securities held at December 31, 2018 and 2017, which are classified as marketable securities in the Consolidated Balance Sheets: Municipal Bonds — Available-for-Sale December 31, 2018 2017 (in thousands) Contractual maturity: Maturing in one year or less $ 1,645 $ 916 Maturing in second year through fifth year 24,649 15,948 Maturing in sixth year through tenth year 14,769 22,851 Maturing after ten years 35,299 33,506 Total debt securities $ 76,362 $ 73,221

Accounts and Notes Receivable (

Accounts and Notes Receivable (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Accounts and Notes Receivables	The Company’s accounts and notes receivable balances consisted of the following as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 (in thousands) Short-term Accounts and notes receivable $ 389,047 $ 390,705 Allowance for doubtful accounts (47,209) (11,985) Total net short-term accounts and notes receivable 341,838 378,720 Long-term Notes receivable 53,043 15,476 Allowance for doubtful accounts (10,000) — Total net long-term notes receivable 43,043 15,476 Total net accounts and notes receivable $ 384,881 $ 394,196

Allowance for Doubtful Accoun_2

Allowance for Doubtful Accounts (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Allowance for Doubtful Debts	In order to provide for these collection problems and the general risk associated with the granting of credit terms, the Company recorded the following bad debt provisions (in an Allowance for Doubtful Accounts): Year Ended December 31, 2018 2017 2016 (in thousands) Bad debt provision $ 51,387 $ 6,250 $ 4,629
Impaired Notes Receivable	December 31, 2018, 2017 and 2016 are as follows: Impaired Notes Receivable Year Ended December 31, Balance Beginning of Year Additions Deductions Balance End of Year Average Outstanding Balance (in thousands) 2018 $ 6,854 $ 23,382 $ 4,532 $ 25,704 $ 15,448 2017 $ 5,685 $ 1,169 $ — $ 6,854 $ 6,270 2016 $ 6,471 $ — $ 786 $ 5,685 $ 6,078 Reserve for Impaired Notes Receivable Year Ended December 31, Balance Beginning of Year Additions Deductions Balance End of Year (in thousands) 2018 $ 2,884 $ 12,526 $ 1,938 $ 13,472 2017 $ 2,419 $ 465 $ — $ 2,884 2016 $ 2,139 $ 280 $ — $ 2,419

Lease Commitments (Tables)

Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Leases, Operating [Abstract]
Future Minimum Lease Payments under Operating Leases	The following is a schedule by calendar year of future minimum lease payments under operating leases that have remaining terms as of December 31, 2018: Period/Year Operating Leases (in thousands) 2019 $ 3,203 2020 2,799 2021 1,097 2022 677 2023 677 Thereafter 677 Total minimum lease payments $ 9,130
Operating Leases Expense	Total expense for all operating leases for the years ended December 31, 2018, 2017 and 2016 was as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Operating lease expense $ 4,039 $ 3,833 $ 2,615

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock-Based Compensation Expense	A summary of stock-based compensation expense and related tax benefits for the years ended December 31, 2018, 2017 and 2016 is as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Stock options $ 2,989 $ 3,740 $ 3,193 Restricted stock units and restricted stock 2,591 1,205 550 Employee Stock Purchase Plan 320 1,040 509 Total pre-tax stock-based compensation expense charged against income 1 $ 5,900 $ 5,985 $ 4,252 Total recognized tax benefit related to stock-based compensation $ 1,480 $ 5,709 $ 2,773 1 Stock-based compensation expense is recorded in the selling, general and administrative caption in the Consolidated Statements of Comprehensive Income.
Summary of Stock Options Activity	A summary of stock options outstanding under the Plan as of December 31, 2018 and changes during 2018 is as follows: Number of Shares Weighted Average Exercise Price (in thousands) December 31, 2017 2,374 $ 29.22 Granted 169 $ 52.06 Exercised (351) $ 25.12 Forfeited (65) $ 35.50 Expired (6) $ 27.10 December 31, 2018 2,121 $ 31.53
Assumption for Fair Value of Options Granted	The fair value of the stock option awards granted during 2018, 2017 and 2016 were estimated on the dates of grant using the Black-Scholes option valuation model and the following assumptions: Year Ended December 31, 2018 2017 2016 Risk-free interest rate 2.1 % 2.0 % 2.0 % Weighted average expected life 5.8 years 5.8 years 5.8 years Expected volatility 21.5 % 25.1 % 26.0 % Dividend yield 1.5 % 1.9 % 2.0 %
Summarized Information of Stock Options Outstanding	The following table summarizes other information about the stock options at December 31, 2018: December 31, 2018 (amounts in thousands, except per share data) Outstanding: Aggregate intrinsic value $ 20,351 Weighted average remaining contractual life 5.9 years Exercisable: Number of options 1,051 Weighted average exercise price $ 25.20 Aggregate intrinsic value $ 15,750 Weighted average remaining contractual life 4.5 years
Summary of Stock Options Outstanding	A summary of the outstanding restricted stock units and restricted stock as of December 31, 2018 and changes during 2018 is as follows: Restricted Stock Units and Restricted Stock Number Weighted Average Grant Date Fair Value (in thousands) December 31, 2017 145 $ 37.07 Granted 139 $ 52.06 Vested (36) $ 35.79 Forfeited (7) $ 52.06 December 31, 2018 241 $ 45.47
Weighted Average Grant-Date Fair Values and Intrinsic Values of Options Vested	The weighted average grant-date fair values and total fair values of restricted stock units and restricted stock vested during 2018, 2017 and 2016 are as follows: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Weighted average grant-date fair value of restricted stock units and restricted stock granted $ 52.06 $ 40.16 $ 34.14 Total fair value of restricted stock units and restricted stock vested $ 1,822 $ 690 $ 311
Summary of ESPP Annual Offerings	The following table summarizes information about the Company’s ESPP annual offerings for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Common shares purchased 53 54 53 Per common share purchase price $ 34.15 $ 33.29 $ 29.64
Summary of Information Of SERP	The following table summarizes information about the SERP for the plan years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands) SERP expense 1 $ 547 $ 503 $ 511 Treasury shares issued to fund SERP expense 2 14 9 13 SERP trust account balance at December 31 3 $ 39,766 $ 42,467 $ 34,599 Unrealized gain (loss) recorded in SERP liability account $ (1,469) $ 4,534 $ 1,495 1 Both the SERP match and the deferrals are included in the selling, general and administrative caption in the Consolidated Statements of Comprehensive Income. 2 Shares related to the SERP match for each year are funded at the beginning of the subsequent year. 3 SERP trust account investments are recorded at their fair value which is based on quoted market prices. Differences between such amounts in the table above and the deferred compensation funding asset reported on the Consolidated Balance Sheets represent the value of Company Common Stock held in the Plan participants’ trust accounts and reported by the Company as treasury stock in the Consolidated Balance Sheets.

Dividends (Tables)

Dividends (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Dividend Payments	During 2018, the Company paid regular quarterly cash dividends totaling $57.2 million as detailed below: Quarter Ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 (in thousands, except per share amounts) Cash dividends paid per common share $ 0.19125 $ 0.19250 $ 0.19375 $ 0.19500 Total cash dividends paid $ 14,149 $ 14,249 $ 14,350 $ 14,453 Record date February 16, 2018 May 25, 2018 August 24, 2018 November 23, 2018 Payment date March 23, 2018 June 29, 2018 September 28, 2018 December 28, 2018
Dividends Payable on Outstanding Weighted Average Basic Common Shares	Cash dividends declared on the Company’s outstanding weighted average number of basic common shares for the years ended December 31, 2018, 2017 and 2016 were as follows: Year Ended December 31, 2018 2017 2016 Cash dividends declared per common share $ 0.77750 $ 0.75750 $ 0.73750

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Summary of Provision for Income Taxes	The following table summarizes the provision for income taxes: Year Ended December 31, 2018 2017 2016 (in thousands) Current: Federal $ 23,407 $ 35,673 $ 33,032 State 5,992 7,179 6,958 29,399 42,852 39,990 Deferred: Federal (9,526) 2,924 2,163 State (3,487) (1,037) 838 (13,013) 1,887 3,001 Tax provision $ 16,386 $ 44,739 $ 42,991
Significant Components of Federal and State Deferred Tax Assets and Liabilities	Significant components of the Company’s federal and state deferred tax asset and liability balances are as follows: Year Ended December 31, 2018 2017 (in thousands) Deferred tax assets: Allowance for doubtful accounts $ 14,599 $ 3,109 Deferred compensation 7,350 6,601 Accrued insurance claims 3,715 3,665 Non-deductible reserves 336 567 Amortization of intangibles 24 162 Other 1,730 662 27,754 14,766 Deferred tax liabilities: Expensing of housekeeping supplies (4,375) (4,678) Depreciation of property and equipment (1,913) (1,745) Other (914) (845) (7,202) (7,268) Net deferred tax assets $ 20,552 $ 7,498
Reconciliation of The Provision for Income Taxes	The table below provides a reconciliation between the tax expense computed by applying the statutory federal income tax rate to income before income taxes and the provision for income taxes: Year Ended December 31, 2018 2017 2016 (in thousands) Income tax expense computed at statutory rate $ 20,981 $ 46,538 $ 42,136 Increases (decreases) resulting from: State income taxes, net of federal tax benefit 1,936 3,661 5,064 Federal jobs credits (5,006) (4,193) (4,550) Tax exempt interest (384) (568) (457) Stock-based compensation (1,179) (4,632) 653 United States Tax Reform - remeasurement of deferred taxes — 3,719 — Other, net 38 214 145 Income tax expense $ 16,386 $ 44,739 $ 42,991

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Information of Reportable Segments	All revenues and net income are earned in the United States. Year Ended December 31, 2018 2017 2016 (in thousands) Revenues 1 Housekeeping services $ 973,826 $ 979,610 $ 957,148 Dietary services 1,034,995 886,521 605,514 Corporate and eliminations $ — $ — $ — Consolidated $ 2,008,821 $ 1,866,131 $ 1,562,662 Income before income taxes Housekeeping services 2 $ 108,305 $ 95,505 $ 90,756 Dietary services 60,562 46,008 34,641 Corporate and eliminations 3 (68,957) (8,548) (5,010) Consolidated $ 99,910 $ 132,965 $ 120,387 Depreciation and amortization Housekeeping services $ 6,315 $ 6,547 $ 6,535 Dietary services 2,433 1,813 439 Corporate and eliminations 524 526 522 Consolidated $ 9,272 $ 8,886 $ 7,496 Total assets Housekeeping services $ 291,117 $ 304,303 $ 266,464 Dietary services 235,183 242,874 127,187 Corporate and eliminations 4 166,303 128,826 134,795 Consolidated $ 692,603 $ 676,003 $ 528,446 Capital expenditures Housekeeping services $ 3,996 $ 4,287 $ 4,612 Dietary services 690 663 410 Corporate and eliminations 254 447 420 Consolidated $ 4,940 $ 5,397 $ 5,442 1 F or the years ended December 31, 2018 and 2017, both the Housekeeping and Dietary segments earned revenue from several significant customers, including Genesis. For the years ended December 31, 2018 and 2017, Genesis accounted for $386.7 million or 19.3% and $327.5 million or 17.5% of the Company's consolidated revenues, respectively. 2 Includes the impact of the revenues earned and expenses incurred from the Voluntary Benefits Program of the Company's wholly-owned captive insurance subsidiary. 3 Represents primarily corp orate office cost and related overhead, recording of certain inventories and supplies and workers compensation costs at the reportable segment level which use accounting methods that differ from those used at the corporate level, as well as consolidated subsidiaries’ operating expenses that are not allocated to the reportable segments, net of investment and interest income. 4 Primarily consists of cash and cash equivalents, marketable securities, deferred income taxes and other current and noncurrent assets.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Earnings Per Share	The table below reconciles the weighted-average basic and diluted common shares outstanding for 2018, 2017 and 2016: Year Ended December 31, 2018 2018 2017 2016 (in thousands) Weighted average number of common shares outstanding - basic 74,002 73,355 72,754 Effect of dilutive securities 1 610 993 720 Weighted average number of common shares outstanding - diluted 74,612 74,348 73,474 1 Certain outstanding equity awards are anti-dilutive and were therefore excluded from the calculation of the weighted average number of diluted common shares outstanding.

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data	The following tables summarize the unaudited quarterly financial data for the last two fiscal years. First Quarter Second Quarter Third Quarter Fourth Quarter (in thousands, except per share amounts) 2018 Revenues $ 501,810 $ 503,732 $ 506,871 $ 496,408 Operating costs and expenses $ 503,681 $ 471,736 $ 475,916 $ 457,251 (Loss) income before income taxes $ (1,395) $ 33,316 $ 32,982 $ 35,007 Net income $ 72 $ 25,814 $ 26,086 $ 31,552 Basic earnings per common share $ 0.00 $ 0.35 $ 0.35 $ 0.43 Diluted earnings per common share $ 0.00 $ 0.35 $ 0.35 $ 0.42 Cash dividends declared per common share $ 0.19250 $ 0.19375 $ 0.19500 $ 0.19625 2017 Revenues $ 404,490 $ 470,876 $ 491,355 $ 499,410 Operating costs and expenses $ 373,780 $ 439,313 $ 459,864 $ 466,285 Income before income taxes $ 32,279 $ 33,078 $ 32,930 $ 34,678 Net income $ 22,017 $ 22,551 $ 23,472 $ 20,186 Basic earnings per common share $ 0.30 $ 0.31 $ 0.32 $ 0.27 Diluted earnings per common share $ 0.30 $ 0.30 $ 0.31 $ 0.27 Cash dividends declared per common share $ 0.18750 $ 0.18875 $ 0.19000 $ 0.19125

Description of Business and S_3

Description of Business and Significant Accounting Policies - Nature of Operations (Details)	12 Months Ended
	Dec. 31, 2018segment
Schedule of Accounting Policies [Line Items]
Service agreement term	1 year
Number of reportable segments	2
Minimum
Schedule of Accounting Policies [Line Items]
Days to notify cancellation of service	30 days
Initial period of service term	60 days
Maximum
Schedule of Accounting Policies [Line Items]
Days to notify cancellation of service	90 days
Initial period of service term	120 days

Description of Business and S_4

Description of Business and Significant Accounting Policies - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Notes receivable	$ 2.9	$ 6.9
Discounted notes receivable	$ 2.9	$ 6.8

Description of Business and S_5

Description of Business and Significant Accounting Policies - Investments in Marketable Securities and Inventories and Supplies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Marketable securities, at fair value	$ 76,362	$ 73,221
Unrealized gains (losses) from marketable securities	$ (800)	$ 1,100
Amortization period of inventories and supplies	24 months

Description of Business and S_6

Description of Business and Significant Accounting Policies - Property and Equipment and Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation	$ 4.9	$ 5	$ 4.8
Housekeeping and Dietary equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	5 years
Housekeeping and Dietary equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	7 years
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Useful life	7 years
Autos and Trucks | Minimum
Property, Plant and Equipment [Line Items]
Useful life	5 years
Autos and Trucks | Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years

Description of Business and S_7

Description of Business and Significant Accounting Policies - Advertising Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Advertising expense	$ 0	$ 0	$ 0

Description of Business and S_8

Description of Business and Significant Accounting Policies - Identifiable Intangible Assets and Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Impairment loss on goodwill and intangible assets	$ 0	$ 0	$ 0

Description of Business and S_9

Description of Business and Significant Accounting Policies - Concentrations of Credit Risk and Significant Clients (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)financial_institution	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)financial_institution	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2018USD ($)financial_institution	Dec. 31, 2017USD ($)financial_institution	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Number of financial institutions holding cash and cash equivalents and marketable securities | financial_institution	1				1				1	1
Concentration Risk [Line Items]
Revenue	$ 496,408	$ 506,871	$ 503,732	$ 501,810	$ 499,410	$ 491,355	$ 470,876	$ 404,490	$ 2,008,821	$ 1,866,131	$ 1,562,662
Customer Concentration Risk | Revenue from Contract with Customer | Genesis
Concentration Risk [Line Items]
Revenue									$ 386,700	$ 327,500
Concentration risk, percentage									19.30%	17.50%

Description of Business and _10

Description of Business and Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-02 - Subsequent Event $ in Millions	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability	$ 11.4
Right-of-use asset	$ 11.4

Revenue (Details)

Revenue (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue	$ 496,408,000	$ 506,871,000	$ 503,732,000	$ 501,810,000	$ 499,410,000	$ 491,355,000	$ 470,876,000	$ 404,490,000	$ 2,008,821,000	$ 1,866,131,000	$ 1,562,662,000
Renewable service term period									1 year
Description of timing									The significant majority of the Company’s contracts with customers have an initial term of one year or less
Renewal term									1 year
Minimum agreement period for account of unsatisfied performance obligations									1 year
Minimum
Disaggregation of Revenue [Line Items]
Cancellation notice period									30 days
Initial period preceding cancellation notice									60 days
Maximum
Disaggregation of Revenue [Line Items]
Cancellation notice period									90 days
Initial period preceding cancellation notice									120 days
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Contract liabilities	200,000				0				$ 200,000	0
Transferred over Time
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 4,600,000				$ 0				$ 4,600,000	0
Transferred over Time | Minimum
Disaggregation of Revenue [Line Items]
Service agreement period									30 days
Transferred over Time | Maximum
Disaggregation of Revenue [Line Items]
Service agreement period									60 days
Housekeeping
Disaggregation of Revenue [Line Items]
Revenue									$ 973,800,000	979,600,000	957,100,000
Dietary
Disaggregation of Revenue [Line Items]
Revenue									$ 1,035,000,000	$ 886,500,000	$ 605,500,000

Revenue - Remaining Performance

Revenue - Remaining Performance Obligation (Details) - Transferred over Time $ in Millions	Dec. 31, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 186.2
Revenue, remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 186.2
Revenue, remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 186.2
Revenue, remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 186.2
Revenue, remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 186.2
Revenue, remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 31
Revenue, remaining performance obligation period

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income by Component - Summary of Changes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 399,952	$ 338,842	$ 296,456
Other comprehensive (loss) income before reclassifications	(844)	1,149	(1,005)
Losses reclassified from other comprehensive income	165	7	143
Net current period other comprehensive (loss) income	(679)	1,156	(862)
Balance	440,780	399,952	338,842
Realized (loss) gain on sales of available-for-sale securities	(200)		(200)
Changes in other comprehensive income (loss), tax expense (benefit)	(100)	300	(500)
Maximum
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Realized (loss) gain on sales of available-for-sale securities		(100)
Accumulated Other Comprehensive Income (Loss), net of Taxes
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	837	(319)	543
Balance	$ 158	$ 837	$ (319)

Changes in Accumulated Other _4

Changes in Accumulated Other Comprehensive Income by Component - Reclassification Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit									$ (16,386)	$ (44,739)	$ (42,991)
Net income	$ 31,552	$ 26,086	$ 25,814	$ 72	$ 20,186	$ 23,472	$ 22,551	$ 22,017	83,524	88,226	77,396
Realized Gains (Losses) on Sale of Available-for-sale Securities | Amounts Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Losses from the sale of available-for-sale securities									197	11	222
Tax benefit									(32)	(4)	(79)
Net income									$ 165	$ 7	$ 143

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 35,630	$ 36,004
Less accumulated depreciation	22,730	22,495
Total property and equipment, net	12,900	13,509
Depreciation	4,900	5,000	$ 4,800
Housekeeping and Dietary equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	22,596	22,349
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	12,114	12,665
Other
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 920	$ 990

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Cumulative goodwill impairment	$ 0
Goodwill	51,084,000	$ 51,084,000
Amortization expense	$ 4,400,000	$ 3,900,000	$ 2,700,000
Customer Relationships
Goodwill [Line Items]
Useful life	9 years 10 months 24 days
Housekeeping Segment
Goodwill [Line Items]
Goodwill	$ 42,400,000
Dietary Segment
Goodwill [Line Items]
Goodwill	$ 8,700,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Estimated Amortization Expense for Intangibles Subject to Amortization (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 4,165
2020	4,165
2021	4,165
2022	4,165
2023	3,168
Thereafter	$ 6,690

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Unrealized (loss) gain on available-for-sale marketable securities, net of taxes	$ (679)	$ 1,156	$ (862)
Proceeds from available for sale municipal bonds	9,000	28,500	28,100
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized (loss) gain on sales of available-for-sale securities	$ (200)		$ (200)
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized (loss) gain on sales of available-for-sale securities		$ (100)

Fair Value Measurements - Marke

Fair Value Measurements - Marketable Securities and Deferred Compensation Fund Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Assets:
Marketable securities	$ 76,362	$ 73,221
Deferred compensation fund	29,113	28,885
Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	26,584	26,165
Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	2,529	2,720
Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Carrying Amount
Financial Assets:
Deferred compensation fund	29,113	28,885
Total Fair Value
Financial Assets:
Deferred compensation fund	29,113	28,885
Municipal bonds — available-for-sale | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Marketable securities	0	0
Municipal bonds — available-for-sale | Significant Other Observable Inputs (Level 2)
Financial Assets:
Marketable securities	76,362	73,221
Municipal bonds — available-for-sale | Significant Unobservable Inputs (Level 3)
Financial Assets:
Marketable securities	0	0
Municipal bonds — available-for-sale | Carrying Amount
Financial Assets:
Marketable securities	76,362	73,221
Municipal bonds — available-for-sale | Total Fair Value
Financial Assets:
Marketable securities	76,362	73,221
Money Market | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	0	0
Money Market | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	2,529	2,720
Money Market | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Money Market | Carrying Amount
Financial Assets:
Deferred compensation fund	2,529	2,720
Money Market | Total Fair Value
Financial Assets:
Deferred compensation fund	2,529	2,720
Balanced and Lifestyle | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	8,265	8,523
Balanced and Lifestyle | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0	0
Balanced and Lifestyle | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Balanced and Lifestyle | Carrying Amount
Financial Assets:
Deferred compensation fund	8,265	8,523
Balanced and Lifestyle | Total Fair Value
Financial Assets:
Deferred compensation fund	8,265	8,523
Large Cap Growth | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	8,195	7,802
Large Cap Growth | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0	0
Large Cap Growth | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Large Cap Growth | Carrying Amount
Financial Assets:
Deferred compensation fund	8,195	7,802
Large Cap Growth | Total Fair Value
Financial Assets:
Deferred compensation fund	8,195	7,802
Small Cap Value | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund		3,442
Small Cap Value | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund		0
Small Cap Value | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund		0
Small Cap Value | Carrying Amount
Financial Assets:
Deferred compensation fund		3,442
Small Cap Value | Total Fair Value
Financial Assets:
Deferred compensation fund		3,442
Small Cap Growth | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	3,217
Small Cap Growth | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0
Small Cap Growth | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0
Small Cap Growth | Carrying Amount
Financial Assets:
Deferred compensation fund	3,217
Small Cap Growth | Total Fair Value
Financial Assets:
Deferred compensation fund	3,217
Fixed Income | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	3,432	3,050
Fixed Income | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0	0
Fixed Income | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Fixed Income | Carrying Amount
Financial Assets:
Deferred compensation fund	3,432	3,050
Fixed Income | Total Fair Value
Financial Assets:
Deferred compensation fund	3,432	3,050
International | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	1,485	1,531
International | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0	0
International | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
International | Carrying Amount
Financial Assets:
Deferred compensation fund	1,485	1,531
International | Total Fair Value
Financial Assets:
Deferred compensation fund	1,485	1,531
Mid Cap Growth | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Deferred compensation fund	1,990	1,817
Mid Cap Growth | Significant Other Observable Inputs (Level 2)
Financial Assets:
Deferred compensation fund	0	0
Mid Cap Growth | Significant Unobservable Inputs (Level 3)
Financial Assets:
Deferred compensation fund	0	0
Mid Cap Growth | Carrying Amount
Financial Assets:
Deferred compensation fund	1,990	1,817
Mid Cap Growth | Total Fair Value
Financial Assets:
Deferred compensation fund	$ 1,990	$ 1,817

Fair Value Measurements - Mar_2

Fair Value Measurements - Marketable Debt Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	$ 76,162	$ 72,249	$ 68,220
Gross Unrealized Gains	633	1,169	178
Gross Unrealized Losses	(433)	(197)	(668)
Estimated Fair Value	76,362	73,221	67,730
Other-Than-Temporary Impairments	0	0	0
Municipal bonds — available-for-sale
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	76,162	72,249	68,220
Gross Unrealized Gains	633	1,169	178
Gross Unrealized Losses	(433)	(197)	(668)
Estimated Fair Value	76,362	73,221	67,730
Other-Than-Temporary Impairments	$ 0	$ 0	$ 0

Fair Value Measurements - Contr

Fair Value Measurements - Contractual Maturities of Available for Sale Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Maturing in one year or less	$ 1,645	$ 916
Maturing in second year through fifth year	24,649	15,948
Maturing in sixth year through tenth year	14,769	22,851
Maturing after ten years	35,299	33,506
Total debt securities	$ 76,362	$ 73,221	$ 67,730

Accounts and Notes Receivable -

Accounts and Notes Receivable - Schedule of Net Accounts and Notes Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Short-term
Accounts and notes receivable	$ 389,047	$ 390,705
Allowance for doubtful accounts	(47,209)	(11,985)
Total net short-term accounts and notes receivable	341,838	378,720
Long-term
Notes receivable	53,043	15,476
Allowance for doubtful accounts, noncurrent	(10,000)	0
Total net long-term notes receivables	43,043	15,476
Total net accounts and notes receivable	$ 384,881	$ 394,196

Accounts and Notes Receivable_2

Accounts and Notes Receivable - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Accounts receivable reclassified to long-term notes receivable	$ 24,800
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	43,043	$ 15,476
Notes outstanding, net	63,300	$ 36,600
Note Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 10,000

Allowance for Doubtful Accoun_3

Allowance for Doubtful Accounts - Bad Debt Provisions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Bad debt provision	$ 51,387	$ 6,250	$ 4,629

Allowance for Doubtful Accoun_4

Allowance for Doubtful Accounts - Impaired Notes Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 43,043	$ 15,476
Impaired Notes Receivable:
Balance beginning of year	6,854	5,685	$ 6,471
Additions	23,382	1,169	0
Deductions	4,532	0	786
Balance end of year	25,704	6,854	5,685
Average Outstanding balance	15,448	6,270	6,078
Reserve for Impaired Notes Receivable:
Balance beginning of year	2,884	2,419	2,139
Additions	12,526	465	280
Deductions	1,938	0	0
Balance end of year	13,472	$ 2,884	$ 2,419
Note Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 10,000

Lease Commitments - Future Mini

Lease Commitments - Future Minimum Lease Payments Under Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases
2019	$ 3,203
2020	2,799
2021	1,097
2022	677
2023	677
Thereafter	677
Total minimum lease payments	$ 9,130

Lease Commitments - Operating L

Lease Commitments - Operating Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases, Operating [Abstract]
Operating lease expense	$ 4,039	$ 3,833	$ 2,615

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax stock-based compensation expense charged against income	$ 5,900	$ 5,985	$ 4,252
Total recognized tax benefit related to stock-based compensation	1,480	5,709	2,773
Unrecognized compensation cost	$ 14,000	$ 11,400
Period of expense of unrecognized compensation cost, years	2 years 6 months	2 years 8 months 12 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax stock-based compensation expense charged against income	$ 2,989	$ 3,740	3,193
Restricted stock and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax stock-based compensation expense charged against income	$ 2,591	1,205	550
Period of expense of unrecognized compensation cost, years	3 years 3 months 18 days
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax stock-based compensation expense charged against income	$ 320	$ 1,040	$ 509

Share-Based Compensation - 2012

Share-Based Compensation - 2012 Equity Incentive Plan (Details) shares in Millions	12 Months Ended
	Dec. 31, 2018shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common stock reserved for future issuance (in shares)	2.9
Shares available for future grant (in shares)	0.5
Maximum term of grants	10 years
Options vested and exercisable, period	5 years

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Stock Options Activity (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Number of Shares
Beginning of period (in shares) | shares	2,374
Granted (in shares) | shares	169
Exercised (in shares) | shares	(351)
Forfeited (in shares) | shares	(65)
Expired (in shares) | shares	(6)
End of period (in shares) | shares	2,121
Weighted Average Exercise Price
Beginning of period (in dollars per share) | $ / shares	$ 29.22
Granted (in dollars per share) | $ / shares	52.06
Exercised (in dollars per share) | $ / shares	25.12
Forfeited (in dollars per share) | $ / shares	35.50
Expired (in dollars per share) | $ / shares	27.10
End of period (in dollars per share) | $ / shares	$ 31.53

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Options, Summary of Other Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options vested	$ 3.7	$ 3.2	$ 2.8
Tax benefit from exercise of stock options	$ 1	$ 5.3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 10.48	$ 8.52	$ 7.46
Total intrinsic value of options exercised	$ 7.8	$ 19.5	$ 4.9

Share-Based Compensation - St_2

Share-Based Compensation - Stock Options, Schedule of Assumptions for Fair Value of Options Granted (Details) - Stock Options	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.10%	2.00%	2.00%
Weighted average expected life in years	5 years 9 months 18 days	5 years 9 months 18 days	5 years 9 months 18 days
Expected volatility	21.50%	25.10%	26.00%
Dividend yield	1.50%	1.90%	2.00%

Share-Based Compensation - Su_3

Share-Based Compensation - Summarized Information of Stock Options Outstanding (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Outstanding:
Aggregate intrinsic value	$ 20,351
Weighted average remaining contractual life	5 years 10 months 24 days
Exercisable:
Number of options (in shares) | shares	1,051
Weighted average exercise price (in dollars per share) | $ / shares	$ 25.20
Aggregate intrinsic value	$ 15,750
Weighted average remaining contractual life	4 years 6 months

Share-Based Compensation - Su_4

Share-Based Compensation - Summary of Restricted Stock Unit and Restricted Stock Activity (Details) - Restricted stock units and restricted stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Restricted Shares
December 31, 2017 (in shares)	145
Granted (in shares)	139
Vested (in shares)	(36)
Forfeited (in shares)	(7)
December 31, 2018 (in shares)	241	145
Weighted Average Grant-Date Fair Value
December 31, 2017 (in dollars per share)	$ 37.07
Granted (in dollars per share)	52.06	$ 40.16	$ 34.14
Vested (in dollars per share)	35.79
Forfeited (in dollars per share)	52.06
December 31, 2018 (in dollars per share)	$ 45.47	$ 37.07

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Units and Restricted Stock, Summary of Other Information (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining vesting period (years)	2 years 6 months	2 years 8 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	100,000	100,000	0
Weighted average grant-date fair value of restricted stock granted (in dollars per share)	$ 52.06	$ 40.16
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0	100,000
Weighted average grant-date fair value of restricted stock granted (in dollars per share)			$ 34.14
Weighted average remaining vesting period (years)	3 years 3 months 18 days
Restricted stock and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	139,000
Weighted average grant-date fair value of restricted stock granted (in dollars per share)	$ 52.06	$ 40.16	$ 34.14
Weighted average remaining vesting period (years)	3 years 3 months 18 days

Share-Based Compensation - Weig

Share-Based Compensation - Weighted Average Remaining Grant-Date and Total Fair Values (Details) - Restricted stock and restricted stock units - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Weighted average grant-date fair value of restricted stock granted (in dollars per share)	$ 52.06	$ 40.16	$ 34.14
Total fair value of stock awards vested during period	$ 1,822	$ 690	$ 311

Share-Based Compensation - Empl

Share-Based Compensation - Employee Stock Purchase Plan (Details) shares in Millions	12 Months Ended
	Dec. 31, 2018USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant (in shares)	0.5
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average weekly hours of work	20 hours
Service period	2 years
Stock options authorized to issue to employees (in shares)	4.1
Shares available for future grant (in shares)	2.2
Annual earnings withheld to purchase common stock | $	$ 21,250
Percent of IRS limitation	85.00%
Maximum fair value of common stock purchased | $	$ 25,000

Share-Based Compensation - Su_5

Share-Based Compensation - Summary of ESPP Annual Offerings (Details) - Employee Stock Purchase Plan - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares purchased (in shares)	53	54	53
Per common share purchase price (in dollars per share)	$ 34.15	$ 33.29	$ 29.64

Share-Based Compensation - Defe

Share-Based Compensation - Deferred Compensation Plan (Details) - SERP shares in Millions	12 Months Ended
	Dec. 31, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of earned income on a pre-tax basis, deferred	25.00%
Percentage of match participants' deferrals	25.00%
Percentage of deferral in the form of common stock	15.00%
Full vest in matching contribution	3 years
Stock options authorized to issue (in shares)	1
Common stock reserved for future issuance (in shares)	0.4
Stock options vested and outstanding (in shares)	0.3

Share-Based Compensation - Su_6

Share-Based Compensation - Summary of Information Of SERP (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
SERP expense	$ 5,900	$ 5,985	$ 4,252
SERP
Defined Benefit Plan Disclosure [Line Items]
SERP expense	$ 547	$ 503	$ 511
Treasury shares issued to fund SERP expense (in shares)	14	9	13
SERP trust account balance at December 31	$ 39,766	$ 42,467	$ 34,599
Unrealized gain (loss) recorded in SERP liability account	$ (1,469)	$ 4,534	$ 1,495

Other Employee Benefit Plans (D

Other Employee Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Maximum percentage of employee contribution	15.00%

Dividends - Quarterly Dividend

Dividends - Quarterly Dividend Payments (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends [Abstract]
Cash dividends paid per common share (in dollars per share)	$ 0.19500	$ 0.19375	$ 0.19250	$ 0.19125
Total cash dividends paid	$ 14,453	$ 14,350	$ 14,249	$ 14,149	$ 57,201	$ 55,244	$ 53,342

Dividends - Additional Informat

Dividends - Additional Information (Details) - $ / shares	Feb. 05, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends [Abstract]
Cash dividends declared per common share (in shares)		$ 0.19625	$ 0.19500	$ 0.19375	$ 0.19250	$ 0.19125	$ 0.19000	$ 0.18875	$ 0.18750	$ 0.77750	$ 0.75750	$ 0.73750
Subsequent Event
Dividends [Abstract]
Cash dividends declared per common share (in shares)	$ 0.19625

Dividends - Cash Dividends Per

Dividends - Cash Dividends Per Common Share (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Cash dividends declared per common share (in shares)	$ 0.19625	$ 0.19500	$ 0.19375	$ 0.19250	$ 0.19125	$ 0.19000	$ 0.18875	$ 0.18750	$ 0.77750	$ 0.75750	$ 0.73750

Income Taxes - Summary of Provi

Income Taxes - Summary of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 23,407	$ 35,673	$ 33,032
State	5,992	7,179	6,958
Total	29,399	42,852	39,990
Deferred:
Federal	(9,526)	2,924	2,163
State	(3,487)	(1,037)	838
Total	(13,013)	1,887	3,001
Tax provision	$ 16,386	$ 44,739	$ 42,991

Income Taxes - Significant Comp

Income Taxes - Significant Components of Federal and State Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for doubtful accounts	$ 14,599	$ 3,109
Deferred compensation	7,350	6,601
Accrued insurance claims	3,715	3,665
Non-deductible reserves	336	567
Amortization of intangibles	24	162
Other	1,730	662
Deferred tax assets	27,754	14,766
Deferred tax liabilities:
Expensing of housekeeping supplies	(4,375)	(4,678)
Depreciation of property and equipment	(1,913)	(1,745)
Other	(914)	(845)
Deferred tax liabilities	(7,202)	(7,268)
Net deferred tax assets	$ 20,552	$ 7,498

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of The Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense computed at statutory rate	$ 20,981	$ 46,538	$ 42,136
Increases (decreases) resulting from:
State income taxes, net of federal tax benefit	1,936	3,661	5,064
Federal jobs credits	(5,006)	(4,193)	(4,550)
Tax exempt interest	(384)	(568)	(457)
Share-based compensation, excess tax benefit	(1,179)	(4,632)	653
United States Tax Reform - remeasurement of deferred taxes	0	3,719	0
Other, net	38	214	145
Tax provision	$ 16,386	$ 44,739	$ 42,991

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	Dec. 22, 2017	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Adjustment of deferred tax asset	$ 4,500,000
Unrecognized tax benefits		$ 0

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction, Due from (to) Related Party [Abstract]
Fees paid to related party firm (less than)	$ 120	$ 120	$ 120
Percentage of fee paid to related party in relation to related party's total revenue (less than)	5.00%	5.00%	5.00%

Segment Information - Additiona

Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Information - Schedule

Segment Information - Schedule of Information of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 496,408	$ 506,871	$ 503,732	$ 501,810	$ 499,410	$ 491,355	$ 470,876	$ 404,490	$ 2,008,821	$ 1,866,131	$ 1,562,662
Income before income taxes	35,007	$ 32,982	$ 33,316	$ (1,395)	34,678	$ 32,930	$ 33,078	$ 32,279	99,910	132,965	120,387
Depreciation and amortization									9,272	8,886	7,496
Total assets	692,603				676,003				692,603	676,003	528,446
Capital expenditures									4,940	5,397	5,442
Customer Concentration Risk | Revenue from Contract with Customer | Genesis
Segment Reporting Information [Line Items]
Revenues									$ 386,700	$ 327,500
Concentration risk, percentage									19.30%	17.50%
Housekeeping services
Segment Reporting Information [Line Items]
Revenues									$ 973,800	$ 979,600	957,100
Dietary services
Segment Reporting Information [Line Items]
Revenues									1,035,000	886,500	605,500
Operating Segments | Housekeeping services
Segment Reporting Information [Line Items]
Revenues									973,826	979,610	957,148
Income before income taxes									108,305	95,505	90,756
Depreciation and amortization									6,315	6,547	6,535
Total assets	291,117				304,303				291,117	304,303	266,464
Capital expenditures									3,996	4,287	4,612
Operating Segments | Dietary services
Segment Reporting Information [Line Items]
Revenues									1,034,995	886,521	605,514
Income before income taxes									60,562	46,008	34,641
Depreciation and amortization									2,433	1,813	439
Total assets	235,183				242,874				235,183	242,874	127,187
Capital expenditures									690	663	410
Corporate and eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Income before income taxes									(68,957)	(8,548)	(5,010)
Depreciation and amortization									524	526	522
Total assets	$ 166,303				$ 128,826				166,303	128,826	134,795
Capital expenditures									$ 254	$ 447	$ 420

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Weighted average number of common shares outstanding - basic (in shares)	74,002	73,355	72,754
Effect of dilutive securities (in shares)	610	993	720
Weighted average number of common shares outstanding - diluted (in shares)	74,612	74,348	73,474
Options outstanding to purchase common stock excluded from computation of diluted earnings per common share (in shares)	600	100	500
Weighted average exercise price of options (in dollars per share)	$ 42.84	$ 39.38	$ 34.14

Contractual Obligations and O_2

Contractual Obligations and Other Contingencies (Details)	12 Months Ended
	Dec. 31, 2018USD ($)financial_covenant	Jan. 02, 2019USD ($)	Dec. 31, 2017USD ($)
Short-term Debt [Line Items]
Bank line of credit	$ 475,000,000
Borrowings under line of credit	$ 30,000,000		$ 35,382,000
Number of financial covenants | financial_covenant	2
Change in bank line of credit	$ 65,900,000
Standby Letter of Credit
Short-term Debt [Line Items]
Irrevocable standby letter of credit, outstanding	$ 65,900,000
Standby Letter of Credit | Subsequent Event
Short-term Debt [Line Items]
Irrevocable standby letter of credit, outstanding		$ 62,700,000
LIBOR
Short-term Debt [Line Items]
Basis spread on variable rate	1.15%
Prime Rate or Overnight Bank Funding Rate
Short-term Debt [Line Items]
Basis spread on variable rate	0.50%

Accrued Insurance Claims (Detai

Accrued Insurance Claims (Details)	12 Months Ended
	Dec. 31, 2018
Payables and Accruals [Abstract]
Percent of liabilities	31.60%

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 496,408	$ 506,871	$ 503,732	$ 501,810	$ 499,410	$ 491,355	$ 470,876	$ 404,490	$ 2,008,821	$ 1,866,131	$ 1,562,662
Operating costs and expenses	457,251	475,916	471,736	503,681	466,285	459,864	439,313	373,780
Income before income taxes	35,007	32,982	33,316	(1,395)	34,678	32,930	33,078	32,279	99,910	132,965	120,387
Net income	$ 31,552	$ 26,086	$ 25,814	$ 72	$ 20,186	$ 23,472	$ 22,551	$ 22,017	$ 83,524	$ 88,226	$ 77,396
Basic earnings per common share (in dollars per share)	$ 0.43	$ 0.35	$ 0.35	$ 0	$ 0.27	$ 0.32	$ 0.31	$ 0.30	$ 1.13	$ 1.20	$ 1.06
Diluted earnings per common share (in dollars per share)	0.42	0.35	0.35	0	0.27	0.31	0.30	0.30	1.12	1.19	1.05
Cash dividends declared per common share (in shares)	$ 0.19625	$ 0.19500	$ 0.19375	$ 0.19250	$ 0.19125	$ 0.19000	$ 0.18875	$ 0.18750	$ 0.77750	$ 0.75750	$ 0.73750

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - Allowance For Doubtful Accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	$ 11,985	$ 6,911	$ 4,608
Additions
Charged to Costs and Expenses	51,387	6,250	4,629
Charged to Other Accounts	0	0	0
Deductions	6,163	1,176	2,326
Ending Balance	$ 57,209	$ 11,985	$ 6,911