Capital Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 27, 2022	Apr. 26, 2022	Jan. 31, 2022	Jul. 23, 2021	Jul. 22, 2021	Mar. 05, 2020	Oct. 29, 2019	Oct. 22, 2019	Jul. 23, 2012	Feb. 27, 2009
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, shares authorized (in shares)													40,040,000
Preferred stock, par value (in dollars per share)													$ 0.01
Preferred stock, liquidation preference, value					$ 80.0
Common stock, shares authorized (in shares)	350,000,000	175,000,000			175,000,000
Number of shares authorized to be repurchased (in shares)									180,000,000		60,000,000	1,700,000
Stock repurchases (in shares)	4,432,762	4,562,469	5,956,700
Stock repurchases, average price (in dollars per share)		$ 29.03
Share Repurchase Program, 2019
Subsidiary or Equity Method Investee [Line Items]
Stock repurchases (in shares)	513,725
Stock repurchases, average price (in dollars per share)	$ 31.25
Share Repurchase Program, 2022
Subsidiary or Equity Method Investee [Line Items]
Stock repurchases (in shares)	3,919,037
Stock repurchases, average price (in dollars per share)	$ 24.26
Common Class A
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares authorized (in shares)				350,000,000
Number of shares authorized to be repurchased (in shares)						175,000,000	276,500,000	180,000,000
Reliance Bancshares, Inc. | Series D Preferred Stock
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, par value (in dollars per share)										$ 0.01