Stock-Based Compensation Performance Contingent Deferred Stock (Details) (Amended and Restated 2004 Omnibus Stock Plan, Performance Contingent Deferred Stock, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Amended and Restated 2004 Omnibus Stock Plan | Performance Contingent Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding non-vested beginning balance (in shares)	107	0	0
Granted	82	133	46
Cancelled (in shares)	(32)	(26)	(46)
Vested	(50)
Outstanding non-vested ending balance (in shares)	107	107	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding non-vested Weighted-Average Grant Date Fair Value, begining blance (in dollars per share)	$ 13.67	$ 0.00	$ 0.00
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 17.36	$ 13.67	$ 14.78
Cancelled, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 16.02	$ 13.64	$ 14.78
Vested, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 13.67
Outstanding non-vested Weighted-Average Grant Date Fair Value, ending blance (in dollars per share)	$ 15.78	$ 13.67	$ 0.00
Outstanding at year end, Weighted-Average Remaing Contractual Life (in years)	4 years