Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock option activity
Balance at the beginning of the period (in shares)	417,581	472,156	510,574
Exercised (in shares)	(211,057)	(54,575)	(38,418)
Balance at the end of the period (in shares)	206,524	417,581	472,156
Vested and Expected to Vest (in shares)	206,460
Exercisable at the end of the period (in shares)	197,576
Weighted average exercise price
Balance at the beginning of the period (in dollars per share)	$ 31.58	$ 30.41	$ 30.60
Exercised (in dollars per share)	14.65	21.45	32.94
Balance at the end of the period (in dollars per share)	48.88	$ 31.58	$ 30.41
Vested and Expected to Vest (in dollars per share)	48.87
Exercisable at the end of the period (in dollars per share)	$ 47.20
Weighted average remaining contractual life
Outstanding at the beginning of period	3 years 5 months 4 days
Vested and Expected to Vest	3 years 5 months 4 days
Exercisable at the end of period	3 years 3 months 18 days
Aggregate intrinsic value
Outstanding at the end of the period	$ 11,719
Vested and Expected to Vest	11,717
Exercisable at the end of the period	$ 11,543