Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 14,100,000	$ 8,600,000
Tax benefit from the release of a valuation allowance in a foreign jurisdiction		$ 9,100,000
Estimated annual effective income tax rate excluding discrete benefits (as a percent)	25.00%
U.S. federal statutory income tax rate (as a percent)	21.00%		35.00%
Tax cuts and jobs act, adjustments to previous estimated value	$ 0