Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Net Income
Income from continuing operations	$ 5,637	$ 6,936	$ 7,482	$ 13,256
Income from discontinued operations		1,373		1,721
Net income	$ 5,637	$ 8,309	$ 7,482	$ 14,977	$ 13,370
Basic earnings per common share
Weighted-average common shares outstanding used in earnings per share computations	62,734	62,446	62,711	62,459
Continuing operations (in dollars per share)	$ 0.09	$ 0.11	$ 0.12	$ 0.21
Discontinued operations (in dollars per share)	$ 0.00	$ 0.02	$ 0.00	$ 0.03
Basic earnings per common share (in dollars per share)	$ 0.09	$ 0.13	$ 0.12	$ 0.24
Diluted earnings per common share
Shares used in diluted earnings per share computations	62,987	62,761	62,975	62,712
Continuing operations (in dollars per share)	$ 0.09	$ 0.11	$ 0.12	$ 0.21
Discontinued operations (in dollars per share)	$ 0.00	$ 0.02	$ 0.00	$ 0.03
Diluted earnings per common share (in dollars per share)	$ 0.09	$ 0.13	$ 0.12	$ 0.24
Computation of Shares Used in Earnings Per Share Computations
Weighted-average common shares outstanding (in shares)	62,734	62,446	62,711	62,459
Weighted-average common equivalent shares - dilutive effect of stock options and awards	253	315	264	253
Shares used in diluted earnings per share computations	62,987	62,761	62,975	62,712