Income Taxes (Tables)

6 Months Ended

Jun. 30, 2017

Income Tax Disclosure [Abstract]

Income tax expense (benefit)

The Company's income tax expense consisted of the following:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2017			2016		2017			2016
Income before provision for income taxes	$	50,373		$	46,340	$	43,366		$	82,096
Income tax expense using estimated annual effective income tax rate	19,152			18,793		16,457			33,317
Changes in effective tax rates	(56		)	210		—			—
Impact of discrete items, net	(269		)	—		(412		)	49
Income tax expense	$	18,827		$	19,003	$	16,045		$	33,366