Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 454,433	$ 434,288	$ 290,584
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for doubtful accounts	9,868	11,914	8,022
Depreciation	64,264	64,244	63,930
Amortization of Cloud Computing Implementation Costs	3,624	0	0
Amortization of intangible assets	1,361	1,705	1,563
Stock-based compensation	48,300	44,953	42,191
Deferred income taxes	(9,473)	(15,885)	44,091
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(48,461)	(86,217)	(17,039)
Capitalized cloud computing implementation costs	(30,338)	0	0
Accounts payable and accrued expenses	(9,204)	32,428	1,328
Accrued payroll and benefit cost	60,883	57,287	46,504
Income taxes payable	(18,798)	28,900	(9,655)
Other assets and liabilities, net	(6,830)	(1,295)	(18,528)
Net cash flows provided by operating activities	519,629	572,322	452,991
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(59,464)	(42,484)	(40,753)
Payments for employee deferred compensation plans	(71,432)	(69,716)	(56,924)
Redemptions from employee deferred compensation plans	28,758	23,691	20,340
Payments for acquisitions, net of cash acquired	0	0	(1,160)
Net cash flows used in investing activities	(102,138)	(88,509)	(78,497)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from (Repayments of) Debt	(200)	(183)	(167)
Repurchases of common stock	(277,535)	(353,509)	(231,724)
Dividends paid	(145,631)	(136,423)	(121,000)
Net cash flows used in financing activities	(423,366)	(490,115)	(352,891)
Effect of exchange rate fluctuations	(226)	(11,872)	12,949
Change in cash and cash equivalents	(6,101)	(18,174)	34,552
Cash and cash equivalents at beginning of period	276,579	294,753	260,201
Cash and cash equivalents at end of period	270,478	276,579	294,753
Cash paid during the year for:
Interest	232	233	278
Income taxes, net of refunds	191,522	137,147	190,954
Non-cash items:
Stock repurchases awaiting settlement	$ 6,469	$ 11,359	$ 0

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-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(5))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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- Definition

Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

+ References

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