Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator for basic and diluted earnings per share:
Earnings from continuing operations	$ 1,312	$ 2,541	$ 2,691	$ 452					$ 4,395	$ 17,855	$ 11,986
Earnings from discontinued operation	157	284	201						642
Gain on disposal of discontinued operations	4,890								4,890
Earnings allocated to participating securities									(3)	(125)	(162)
Net earnings applicable to common shareholders									$ 9,924	$ 17,730	$ 11,824
Denominator:
Denominator for basic earnings per share - weighted average shares	12,160,000	11,721,000	11,663,000	11,660,000	11,574,000	11,567,000	11,562,000	11,524,000	11,801,000	11,557,000	11,463,000
Assumed exercise of stock options (in shares)									28,000	24,000	25,000
Assumed satisfaction of restricted stock conditions (in shares)									62,000	15,000	1,000
Assumed satisfaction of performance share conditions (in shares)											59,000
Denominator for diluted earnings per share - adjusted weighted average shares	12,253,000	11,813,000	11,754,000	11,743,000	11,619,000	11,606,000	11,600,000	11,557,000	11,891,000	11,596,000	11,548,000
Anti-dilutive stock-based awards excluded from calculation of diluted earnings per share (in shares)									52,125	145,262	161,299