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Net Earnings Per Share (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Income from continuing operations $ 13,632 $ 9,571 $ 23,256 $ 13,916
Loss from discontinued operations 0 (31) (28) (31)
Net income $ 13,632 $ 9,540 $ 23,228 $ 13,885
Weighted average shares outstanding 31,242,000 31,083,000 31,214,000 31,046,000
Common stock options and restricted stock 316,000 215,000 265,000 210,000
Weighted average shares outstanding – Diluted 31,558,000 31,298,000 31,479,000 31,256,000
Common shares        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from earnings per share calculation 759,000 485,000 567,000 511,000