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Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Net income attributable to continuing operations $ 25,486 $ 15,712 $ 67,475 $ 48,750
Preferred stock dividends (11) (10) (29) (30)
Income from continuing operations available to common equity 25,475 15,702 67,446 48,720
Dividends and undistributed earnings allocated to participating securities (38) (45) (105) (141)
Income from continuing operations available to common shareholders 25,437 15,657 67,341 48,579
Net (loss) income attributable to discontinued operations (1,300) 264 (455) 1,206
Preferred stock dividends 1 0 (1) 0
(Loss) income from discontinued operations available to common equity (1,299) 264 (456) 1,206
Dividends and undistributed earnings allocated to participating securities 2 (1) 1 (3)
(Loss) income from discontinued operations available to common shareholders $ (1,297) $ 263 $ (455) $ 1,203
Basic weighted-average shares outstanding (shares) 37,487 37,252 37,407 37,301
Stock options and other stock compensation (shares) 625 457 501 475
Diluted weighted-average shares outstanding (shares) 38,112 37,709 37,908 37,776
Antidilutive stock options (shares) 0 467 0 467
Earnings per share attributable to continuing operations:        
Earnings per share attributable to continuing operations, basic (dollars per share) $ 0.68 $ 0.42 $ 1.80 $ 1.30
Earnings per share attributable to continuing operations, diluted (dollars per share) 0.67 0.41 1.77 1.29
(Loss) earnings per share attributable to discontinued operations:        
Earnings per share attributable to discontinued operations, basic (dollars per share) (0.04) 0.01 (0.01) 0.03
Earnings per share attributable to discontinued operations, diluted (dollars per share) $ (0.04) $ 0.01 $ (0.01) $ 0.03