Benefit Plans - Stock Option Activity (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, outstanding, beginning balance (in shares) | shares	2,656,855
Shares, exercised (in shares) | shares	(75,088)
Shares, forfeited (in shares) | shares	(66,040)
Shares, outstanding, ending balance (in shares) | shares	2,515,727
Shares, exercisable (in shares) | shares	1,030,331
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, outstanding, beginning balance (in dollars per share) | $ / shares	$ 11.27
Weighted average exercise price, exercised (in dollars per share) | $ / shares	7.51
Weighted average exercise price, forfeited (in dollars per share) | $ / shares	9.68
Weighted average exercise price, outstanding, ending balance (in dollars per share) | $ / shares	11.42
Weighted average exercise price, exercisable (in dollars per share) | $ / shares	$ 11.03
Weighted average remaining contractual term, outstanding	5 years 14 days
Weighted average remaining contractual term, exercisable	4 years 11 months 1 day
Aggregate intrinsic value, outstanding | $	$ 19,115,278
Aggregate intrinsic value, exercisable | $	$ 8,232,263