Share-based Compensation (Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options, Outstanding [Roll Forward]
Stock options outstanding, ending balance	139,878
Stock options, Exercisable	64,128
Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Stock options, Weighted Average Exercise Price, beginning balance (in dollars per share)	$ 16.41	$ 8.28	$ 4.03
Stock options, Granted, Weighted Average Exercise Price (in dollars per share)	22.25	0.00	14.89
Stock options, Exercised, Weighted Average Exercise Price (in dollars per share)	$ 20.25	1.75	1.73
Stock options, Canceled, Weighted Average Exercise Price (in dollars per share)		17.58	0
Stock options, Weighted Average Exercise Price, ending balance (in dollars per share)	$ 15.17	$ 16.41	$ 8.28	$ 4.03
Stock options, Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 10.31
Stock Options, Additional Disclosures [Abstract]
Stock options outstanding, Weighted Average Remaining Contractual Term (in years)	2 years 3 months 25 days	1 year 10 months 17 days	1 year	1 year 2 months 1 day
Stock options, Exercisable, Weighted Average Remaining Contractual Term (in years)	1 year 2 months 5 days
Stock options outstanding, Aggregate Intrinsic Value	$ 2,465	$ 121	$ 5,093	$ 24,171
Stock options, Exercisable, Aggregate Intrinsic Value	1,441
Proceeds from stock options exercised	2,209	788	2,161
Stock Options
Stock Options, Additional Disclosures [Abstract]
Stock options exercised in period, intrinsic value	$ 1,300	$ 5,300	$ 11,400
Within Plans
Stock Options, Outstanding [Roll Forward]
Stock options outstanding, beginning balance	207,000	792,000	1,998,633
Stock options, Granted	42,000	0	45,000
Stock options, Exercised	(109,122)	(450,000)	(1,251,633)
Stock options, Canceled	0	(135,000)	0
Stock options outstanding, ending balance	139,878	207,000	792,000	1,998,633
Stock options, Exercisable	64,128