Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to continuing operations	$ 12,683	$ 9,316
Preferred stock dividends	(10)	(10)
Income from continuing operations available to common equity	12,673	9,306
Dividends and undistributed earnings allocated to participating securities	(20)	(28)
Income from continuing operations available to common shareholders	12,653	9,278
Net (loss) income attributable to discontinued operations	(932)	366
Preferred stock dividends	0	0
(Loss) income from discontinued operations available to common equity	(932)	366
Dividends and undistributed earnings allocated to participating securities	1	(1)
(Loss) income from discontinued operations available to common shareholders	$ (931)	$ 365
Basic weighted-average shares outstanding (shares)	37,330	37,356
Stock options and other stock compensation (shares)	429	493
Diluted weighted-average shares outstanding (shares)	37,759	37,849
Antidilutive stock options (shares)	893	495
Earnings per share attributable to continuing operations:
Earnings per share attributable to continuing operations, basic (dollars per share)	$ 0.34	$ 0.25
Earnings per share attributable to continuing operations, diluted (dollars per share)	0.34	0.25
(Loss) earnings per share attributable to discontinued operations:
(Loss) earnings per share attributable to discontinued operations, basic (dollars per share)	(0.03)	0.01
(Loss) earnings per share attributable to discontinued operations, diluted (dollars per share)	$ (0.03)	$ 0.01