Derivative Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross notional amount	$ 0		$ 0
Recognized net gains (losses) from derivatives	(2,300,000)	$ 2,800,000
Foreign currency transaction net gains (losses) before tax	$ 29,700,000	$ (8,900,000)