Capital Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 31, 2022	Jul. 23, 2021	Mar. 05, 2020	Oct. 29, 2019	Oct. 22, 2019	Apr. 19, 2018	Apr. 18, 2018	Jul. 23, 2012	Feb. 27, 2009
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, shares authorized (in shares)		40,040,000										40,040,000
Preferred stock, par value (in dollars per share)		$ 0.01										$ 0.01
Common stock, shares authorized (in shares)	175,000,000	175,000,000							175,000,000	120,000,000
Stock repurchase program, number of shares authorized to be repurchased (in shares)					276,500,000	180,000,000		60,000,000			1,700,000
Stock repurchases (in shares)	4,562,469	5,956,700	390,000
Stock repurchases, average price (in dollars per share)	$ 29.03	$ 19.03
Maximum
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, liquidation preference, value												$ 80,000,000
Series D Preferred Stock | Reliance Bancshares, Inc.
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, par value (in dollars per share)							$ 0.01
Common Class A | Subsequent Event
Subsidiary or Equity Method Investee [Line Items]
Stock repurchase program, number of shares authorized to be repurchased (in shares)				175,000,000