Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 54,863	$ 27,623	$ 151,007	$ 66,293
Preferred dividends	(4,033)	(4,033)	(12,101)	(5,070)
Net income applicable to unvested restricted shares	(517)	(236)	(1,524)	(615)
Net income applicable to common shareholders	50,313	23,354	137,382	60,608
Net income applicable to common shares	$ 50,313	$ 23,354	$ 137,382	$ 60,608
Weighted-average common shares outstanding:
Weighted-average common shares outstanding (basic) (in Shares)	112,898	113,160	112,953	112,079
Dilutive effect of common stock equivalents (in Shares)	878	276	789	322
Weighted-average diluted common shares outstanding (in Shares)	113,776	113,436	113,742	112,401
Basic EPS (in dollars per share)	$ 0.45	$ 0.21	$ 1.22	$ 0.54
Diluted EPS (in dollars per share)	$ 0.44	$ 0.21	$ 1.21	$ 0.54