Earnings Per Share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Computation of basic and diluted earnings per share
Net income	$ 277,472	$ 269,801	$ 164,089
Earnings allocated to participating securities	(1,462)	(1,657)	(1,287)
Dividends on preferred stock	(6,875)	(6,875)	(3,533)
Net income available to common shareholders, basic	269,135	261,269	159,269
Net income available to common shareholders, diluted	$ 269,135	$ 261,269	$ 159,269
Net income per common share:
Basic (in dollars per share)	$ 2.52	$ 2.97	$ 1.91
Diluted (in dollars per share)	$ 2.52	$ 2.97	$ 1.91
Weighted average common shares:
Basic (in shares)	106,661	87,940	83,184
Effect of dilutive securities:
Diluted (in shares)	106,778	88,097	83,248
Stock options
Effect of dilutive securities:
Dilutive securities (in shares)	39	9	0
Restricted stock units
Effect of dilutive securities:
Dilutive securities (in shares)	78	148	64