Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic and Diluted Earnings Per Share
Net income available to common stockholders, basic and diluted		$ 51,610	$ 49,336	$ 153,134	$ 132,279
Average outstanding shares - basic		90,294,811	84,518,407	86,911,402	83,294,111
Add: dilutive restricted stock awards and stock options		154,384	74,715	170,776	68,212
Average outstanding shares - diluted		90,449,195	84,593,122	87,082,178	83,362,323
Basic earnings per share		$ 0.57	$ 0.58	$ 1.76	$ 1.59
Diluted earnings per share		$ 0.57	$ 0.58	$ 1.76	$ 1.59
Restricted stock awards and stock options excluded from the diluted average outstanding share calculation	[1]	4,037	0	1,360	0

[1] Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock award or the exercise price of a stock option exceeds the market price of the Company’s stock.