Earnings Per Common Share (Details) - Basic and Diluted Earnings Per Common Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income		$ 22,855	$ 17,962
Net income applicable to non-vested restricted shares		(234)	(212)
Net income applicable to common shares		$ 22,621	$ 17,750
Weighted-average common shares outstanding (basic) (in Shares)		100,411	77,980
Dilutive effect of common stock equivalents (in Shares)		21	12
Weighted-average diluted common shares outstanding (in Shares)		100,432	77,992
Basic EPS (in Dollars per share)		$ 0.23	$ 0.23
Diluted EPS (in Dollars per share)		$ 0.23	$ 0.23
Anti-dilutive shares not included in the computation of diluted EPS (in Shares)	[1]	343	608

[1] This amount represents outstanding stock options for which the exercise price is greater than the average market price of the Company's common stock.