Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income from continuing operations	$ 14,413	$ 12,683
Preferred stock dividends	(10)	(10)
Income from continuing operations available to common equity	14,403	12,673
Dividends and undistributed earnings allocated to participating securities	(17)	(20)
Income from continuing operations available to common shareholders	14,386	12,653
Net (loss) income from discontinued operations	0	(932)
Preferred stock dividends	0	0
(Loss) income from discontinued operations available to common equity	0	(932)
Dividends and undistributed earnings allocated to participating securities	0	1
(Loss) income from discontinued operations available to common shareholders	$ 0	$ (931)
Basic weighted-average shares outstanding (shares)	37,766	37,330
Stock options and other stock compensation (shares)	827	429
Diluted weighted-average shares outstanding (shares)	38,593	37,759
Antidilutive stock options (shares)	0	893
Earnings per share attributable to continuing operations:
Earnings per share attributable to continuing operations, basic (dollars per share)	$ 0.38	$ 0.34
Earnings per share attributable to continuing operations, diluted (dollars per share)	0.37	0.34
(Loss) earnings per share attributable to discontinued operations:
Earnings per share attributable to discontinued operations, basic (dollars per share)	0.00	(0.03)
Earnings per share attributable to discontinued operations, diluted (dollars per share)	$ 0.00	$ (0.03)