Stock Compensation (Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (in shares)	5,860,833	5,433,626	4,985,059
Granted (in shares)	406,875	427,219	448,580
Exercised (in shares)	(1,824,351)	0	0
Canceled (in shares)	(11)	(12)	(13)
Outstanding (in shares)	4,443,346	5,860,833	5,433,626	4,985,059
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 13.16	$ 12.74	$ 12.10
Granted, Weighted Average Exercise Price (in dollars per share)	10.92	18.42	19.70
Exercised, Weighted Average Exercise Price (in dollars per share)	8.67	0	0
Cancelled, Weighted Average Exercise Price (in dollars per share)	$ 0	0	0
Outstanding, Weighted Average Exercise Price (in dollars per share)		$ 13.16	$ 12.74	$ 12.10
Outstanding, Weighted Average Remaining Contractual Term		4 years 1 month 6 days	4 years 8 months 12 days	5 years 3 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 4,427	$ 1,095	$ 41,069	$ 37,557
Options exercisable (in shares)	2,689,673	4,019,477	3,500,201
Common stock fair value	$ 13.39	$ 9.27	$ 20.30