Share-based Compensation (Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Shares
Options outstanding at beginning of period (shares)	541
Granted (shares)	0
Exercised (shares)	(152)
Forfeited or expired (shares)	(27)
Options outstanding at end of period (shares)	362	541
Options exercisable at end of period (shares)	226
Weighted Average Exercise Price
Options outstanding, Weighted average exercise price at beginning of period (in dollars per share)	$ 11.00
Options granted, Weighted average exercise price (in dollars per share)	0.00
Options exercised, Weighted average exercise price (in dollars per share)	8.36
Options forfeited or expired, Weighted average exercise price (in dollars per share)	25.09
Options outstanding, Weighted average exercise price at end of period (in dollars per share)	11.05	$ 11.00
Options exercisable, Weighted average exercise price at end of period (in dollars per share)	$ 13.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Weighted average remaining contractual life at beginning of period	5 years 8 months 4 days	5 years 4 months 13 days
Options exercisable, Weighted average remaining contractual life at end of period	4 years 29 days
Options outstanding, Aggregate intrinsic value at beginning of period	$ 1,918
Options outstanding, Aggregate intrinsic value at end of period	5,407	$ 1,918
Options exercisable, Aggregate intrinsic value at end of period	$ 2,846
Vested and expected to vest at December 31, 2018
Vested and expected to vest at end of period (shares)	362
Vested and expected to vest, Weighted average exercise price at end of period (in dollars per share)	$ 11.05
Vested and expected to vest, Weighted average remaining contractual life at end of period	5 years 8 months 4 days
Vested and expected to vest, Aggregate intrinsic value at end of period	$ 5,407