Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net (loss) earnings per common share - basic:
Net (loss) earnings	$ (283,000)	$ 2,371,000
Allocation to nonvested restricted stock awards		55,000
Net (loss) earnings available to common stockholders	(283,000)	2,316,000
Weighted-average shares outstanding	31,846,000	31,743,000
Net (loss) earnings per common share - basic (in dollars per share)	$ (0.01)	$ 0.07
Net (loss) earnings per common share - diluted:
Net (loss) earnings	(283,000)	2,371,000
Allocation to nonvested restricted stock awards		55,000
Net (loss) earnings available to common stockholders	(283,000)	2,316,000
Weighted-average shares outstanding	31,846,000	31,743,000
Weighted-average shares and dilutive shares outstanding	31,846,000	31,743,000
Net (loss) earnings per common share - diluted (in dollars per share)	$ (0.01)	$ 0.07
Anti-dilutive securities not included in the computation of diluted EPS (in shares)	0	0
Accounting for stock-based compensation
Stock-based compensation expense for restricted stock awards and stock options	196,000	215,000
Income tax benefit related to restricted stock awards	$ 128,000	$ 176,000