Stock-Based Compensation - Schedule of Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Shares
Options outstanding (in shares) | shares	50,601
Forfeited (in shares) | shares	0
Expired (in shares) | shares	0
Exercised (in shares) | shares	(29,600)
Options outstanding (in shares) | shares	21,001
Weighted Average Exercise Price
Options outstanding, weighted average exercise price (in dollars per share)	$ 18.28
Forfeited, weighted average exercise price (in dollars per share)	0.00
Expired, weighted average exercise price (in dollars per share)	0.00
Exercised, weighted average exercise price (in dollars per share)	18.25
Options outstanding, weighted average exercise price (in dollars per share)	18.32
Weighted Average Grant Date Fair Value
Options outstanding, weighted average grant date fair value (in dollars per share)	4.68
Forfeited, weighted average grant date fair value (in dollars per share)	0.00
Expired, weighted average grant date fair value (in dollars per share)	0.00
Exercised, weighted average grant date fair value (in dollars per share)	4.48
Options outstanding, weighted average grant date fair value (in dollars per share)	$ 4.95