Stock-Based Compensation Time Vested Deferred Stock Activity (Details) (Amended and Restated 2004 Omnibus Stock Plan, Time-Vested Deferred Stock [Member], 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 | Time-Vested Deferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding non-vested beginning balance (in shares)	416	218	182
Granted	104	305	116
Vested	(95)	(70)	(78)
Cancelled (in shares)	(25)	(37)	(2)
Outstanding non-vested ending balance (in shares)	400	416	218
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 Weighted-Average Grant Date Fair Value, begining blance (in dollars per share)	$ 14.68	$ 16.57	$ 18.50
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 17.14	$ 14.74	$ 15.44
Vested, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 12.89	$ 20.59	$ 19.36
Cancelled, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 13.43	$ 15.16	$ 18.63
Outstanding non-vested Weighted-Average Grant Date Fair Value, ending blance (in dollars per share)	$ 15.82	$ 14.68	$ 16.57
Outstanding at year end, Weighted-Average Remaing Contractual Life (in years)	2 years 10 months 19 days
Dividend Participation	$ 370	$ 241	$ 174
Closing market price per share	$ 17.13	$ 13.81	$ 18.59
Equivalent shares at closing market price	22	17	9