Stock-Based Compensation - Option Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Number of Shares
Beginning Balance (in shares) | shares	363,225
Granted (in shares) | shares	189,170
Exercised (in shares) | shares	(80,693)
Expired (in shares) | shares	(2,857)
Forfeited (in shares) | shares	(22,027)
Ending Balance (in shares) | shares	446,818
Exercisable at end of period (in shares) | shares	96,947
Weighted-Average Exercise Price Per Share
Beginning Balance (in dollars per share) | $ / shares	$ 28.33
Granted (in dollars per share) | $ / shares	41.97
Exercised (in dollars per share) | $ / shares	24.97
Expired (in dollars per share) | $ / shares	20.09
Forfeited (in dollars per share) | $ / shares	29.99
Ending Balance (in dollars per share) | $ / shares	34.68
Exercisable at end of period (in dollars per share) | $ / shares	$ 27.70
Weighted-Average Remaining Contractual Life (Years)
Outstanding	7 years 8 months 18 days
Exerciseable	5 years 3 months 18 days
Aggregate Intrinsic Value (in thousands)
Outstanding | $	$ 7,319
Exerciseable | $	$ 2,265