Regulatory Capital and Dividends - Narrative (Details)		12 Months Ended
	Apr. 01, 2022 $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2022	Dec. 31, 2021 USD ($) $ / shares shares	Jan. 27, 2021 USD ($) shares	Jan. 01, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Actual		$ 1,558,281,000		$ 1,374,240,000
Actual		0.0910		0.0930
Dividends available		$ 288,700,000
Dividend reinvestment and stock purchase plan, stockholder's maximum amount of cash payments per quarter in purchase of common stock		5,000
Retained earnings		$ (1,012,774,000)		$ (864,839,000)
Cash dividends on preferred stock (in dollars per share) | $ / shares		$ 140.64
Cash dividends on preferred stock		$ 1,406,000
Stock Repurchase Program
Restructuring Cost and Reserve [Line Items]
Stock authorized to be repurchased (in shares) | shares					3,333,000
Stock authorized to be repurchased (in shares)					$ 100,000,000
Percent of outstanding shares					6.00%
Available to repurchase (in shares) | shares		2,700,000
Available to repurchase		$ 74,500,000
Series A Preferred Stock
Restructuring Cost and Reserve [Line Items]
Preferred Stock, issued (in shares) | shares		10,000		10,000
Liquidation value per share (in dollars per share) | $ / shares		$ 2,500		$ 2,500
Cash dividends on preferred stock (in dollars per share) | $ / shares		$ 46.88
Depository share dividends (in dollars per share)		0.4688
Entity listing, depository receipt ratio	0.01
Cash dividends on preferred stock		$ 1,400,000
Series A Preferred Stock | Level One
Restructuring Cost and Reserve [Line Items]
Preferred Stock, issued (in shares) | shares	10,000
Dividend rate, percentage	7.50%
Liquidation value per share (in dollars per share) | $ / shares	$ 2,500
Outstanding preferred stock		25,000,000
Preferred Class B
Restructuring Cost and Reserve [Line Items]
Entity listing, depository receipt ratio	0.01
Preferred Class B | Level One
Restructuring Cost and Reserve [Line Items]
Entity listing, depository receipt ratio			0.01
Cumulative effect of ASC 326 adoption
Restructuring Cost and Reserve [Line Items]
Retained earnings						$ 68,000,000
PPP
Restructuring Cost and Reserve [Line Items]
Actual		$ 4,700,000		$ 106,600,000
Actual		0		0