Share-Based Compensation (Summary of Nonvested Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested options outstanding, January 1, 2012, shares	163
Granted, shares	18
Vested, shares	(63)
Canceled and forfeited, shares	(57)
Nonvested Outstanding, December 31, 2012, shares	61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested options outstanding, January 1, 2012, weighted average exercise price	$ 26.60
Granted, weighted average exercise price	$ 13.60
Vested, weighted average exercise price	$ 25.38
Canceled and forfeited, weighted average exercise price	$ 25.42
Nonvested Outstanding, December 31, 2012, weighted average exercise price	$ 25.18