Share-based Compensation (Nonvested Options) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Nonvested Option Shares
Nonvested Awards, Number of Shares [Roll Forward]
Nonvested awards, Shares, beginning balance	67,500	112,500	135,000
Nonvested options, Granted	42,000	0	45,000
Nonvested options, Vested	(33,750)	(45,000)	(67,500)
Nonvested options, Canceled	0	0	0
Nonvested awards, Shares, ending balance	75,750	67,500	112,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Exercise Price [Roll Forward]
Nonvested options, Weighted Average Exercise Price, beginning balance (in dollars per share)	$ 16.52	$ 17.32	$ 18.80
Nonvested options, Granted, Weighted Average Exercise Price (in dollars per share)	22.25	0.00	14.89
Nonvested options, Vested, Weighted Average Exercise Price (in dollars per share)	17.47	18.53	18.66
Nonvested options, Canceled, Weighted Average Exercise Price (in dollars per share)	0.00	0.00	0.00
Nonvested options, Weighted Average Exercise Price, ending balance (in dollars per share)	$ 19.27	$ 16.52	$ 17.32
Employee and Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, Granted	0	0	0