Stock-Based Compensation (Summary Of Stock-Based Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Shares, Beginning balance	194
Vested, Shares	(75)
Forfeited, Shares	(1)
Outstanding, Shares, Ending balance	118
Outstanding, Weighted-Average Grant Date Fair Value, Beginning balance	$ 16.56
Vested, Weighted-Average Grant Date Fair Value	$ 16.89
Forfeited, Weighted-Average Grant Date Fair Value	$ 16.96
Outstanding, Weighted-Average Grant Date Fair Value, Ending balance	$ 16.36
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Shares, Beginning balance	303
Granted, Shares	172
Vested, Shares	(86)
Forfeited, Shares	(1)
Outstanding, Shares, Ending balance	388
Outstanding, Weighted-Average Grant Date Fair Value, Beginning balance	$ 17.48
Granted, Weighted-Average Grant Date Fair Value	$ 22.99
Vested, Weighted-Average Grant Date Fair Value	$ 17.45
Forfeited, Weighted-Average Grant Date Fair Value	$ 19.55
Outstanding, Weighted-Average Grant Date Fair Value, Ending balance	$ 19.92
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Shares, Beginning balance	215
Granted, Shares	62	[1]
Outstanding, Shares, Ending balance	277
Outstanding, Weighted-Average Grant Date Fair Value, Beginning balance	$ 16.78
Granted, Weighted-Average Grant Date Fair Value	$ 22.99	[1]
Outstanding, Weighted-Average Grant Date Fair Value, Ending balance	$ 18.18

[1] (1)Represents target number of shares that can vest based on the achievement of the performance goals.