Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	22.40%	25.20%	14.80%	25.40%
Gain (loss) on sales of businesses, net	$ 974	$ 0	$ 122,298	$ 0
Other tax expense			$ 6,700	3,400
Discrete income tax benefit		$ 1,000		$ 1,000