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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Summary of Components of Deferred Tax Assets and Liabilities

The table below summarizes significant components of deferred tax assets and liabilities.

		Year Ended December 31,
		2016				2015
Deferred tax assets
Allowance for doubtful accounts		$	17,220			$	17,953
Accrued vacation and bonus			38,596				37,481
Deferred rent			12,034				13,415
Share-based compensation			24,783				30,037
Notes receivable from employees			21,010				20,353
State net operating loss carryforward and credits			4,169				3,883
Foreign net operating loss carryforward			12,437				6,614
Future foreign tax credit asset			2,545				3,753
Deferred compensation			3,084				2,279
Other, net			5,284				3,754
Total deferred tax assets			141,162				139,522
Deferred tax liabilities
Revenue recognition			(11,590	)			(12,452	)
Property, equipment and capitalized software			(6,527	)			(5,739	)
Goodwill and other intangible asset amortization			(273,990	)			(247,951	)
Total deferred tax liabilities			(292,107	)			(266,142	)
Valuation allowance			(18,900	)			(13,167	)
Net deferred tax liabilities		$	(169,845	)		$	(139,787	)

Summary of Components of Income Before Income Tax Provision from Continuing Operations

The table below summarizes the components of income before income tax provision from continuing operations.

		Year Ended December 31,
		2016				2015				2014
Domestic		$	66,202			$	59,408			$	60,315
Foreign			61,601				45,978				41,096
Total		$	127,803			$	105,386			$	101,411

Summary of Components of Income Tax Provision from Continuing Operations

The table below summarizes the components of income tax provision from continuing operations.

		Year Ended December 31,
		2016				2015				2014
Current
Federal		$	(3,326	)		$	23,957			$	288
State			1,686				1,943				4,681
Foreign			13,864				10,029				14,042
			12,224				35,929				19,011
Deferred
Federal			23,182				1,546				21,657
State			8,284				1,265				2,309
Foreign			(1,407	)			593				(373	)
			30,059				3,404				23,593
Income tax provision		$	42,283			$	39,333			$	42,604

Summary of Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates

Our income tax provision from continuing operations resulted in effective tax rates that varied from the statutory federal income tax rate as summarized below.

		Year Ended December 31,
		2016				2015				2014
Income tax expense at federal statutory rate		$	44,731			$	36,885			$	35,494
State income taxes, net of federal benefit			6,075				1,587				3,494
Benefit from lower foreign tax rates			(7,827	)			(5,973	)			(4,154	)
Valuation allowance on foreign tax credits and    net operating loss carryforward			254				2,326				4,604
Other expenses not deductible for tax purposes			3,082				2,719				2,962
Adjustment to reserve for uncertain tax positions			(3,547	)			658				220
Other adjustments, net			(485	)			1,131				(16	)
Income tax provision		$	42,283			$	39,333			$	42,604

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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