Employee Benefits (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Maximum percentage of elegible compensation able to be contributed to the defined contribution plan	90.00%
Employer match contribution	3.00%
Amount contributed to the defined contribution plan	$ 700,000	$ 700,000	$ 200,000	$ 1,300,000
Share-based compensation expense	0	0	200
Deferred tax asset related to stock-based compensation expense	0	92,000	174,000
Total intrinsic value of options exercised			300,000
Cash received from options exercised			200,000
Fair value of options that became vested during period			6,000
Restricted shares granted	200,798	120,298	104,198
Recognized compensation expense related to restricted shares outstanding	100,000	200,000	200,000
Unrecognized compensation expense related to restricted shares granted	800,000
Unrecognized compensation expense, expected to be recognized in next fiscal year	$ 700,000
Unrecognized compensation expense, period of recognition	2 years
Expiration period of restricted shares	1 year
Maximum [Member]
Vesting period of restriced stock	3 years
Minimum [Member]
Vesting period of restriced stock	6 months