Stock-Based Compensation - Summary of Restricted Stock Units Activity (Details) - Restricted Stock Units	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of shares, Beginning Balance (in shares) | shares	552,238
Number of shares, Granted (in shares) | shares	147,369
Number of shares, Forfeited (in shares) | shares	(11,993)
Number of shares, Settled (in shares) | shares	(126,081)
Number of shares, Ending Balance (in shares) | shares	561,533
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning Balance (in $ per share) | $ / shares	$ 111.49
Weighted Average Grant Date Fair Value, Granted (in $ per share) | $ / shares	108.03
Weighted Average Grant Date Fair Value, Forfeited (in $ per share) | $ / shares	77.21
Weighted Average Grant Date Fair Value, Settled (in $ per share) | $ / shares	96.57
Weighted Average Grant Date Fair Value, Ending Balance (in $ per share) | $ / shares	$ 114.67