Shareholders' Equity - Narrative (Detail) $ / shares in Units, $ in Thousands						3 Months Ended
	Dec. 15, 2021	Sep. 15, 2021 USD ($) $ / shares	Aug. 25, 2021 shares	Jun. 15, 2021	Mar. 15, 2021	Mar. 31, 2022 USD ($) series shares	Dec. 31, 2021 shares
Capital Unit [Line Items]
Stock repurchase program, number of shares authorized to be repurchased			3,235,326
Percentage of company's outstanding shares			10.00%
Stock repurchase program, remaining period			1 year
Stock repurchased during period, shares						115,324
Stock repurchased during period, value | $						$ 6,300
Preferred stock, number of series outstanding | series						2
Redemption of preferred stock | $						$ 6,310
Preferred stock, shares outstanding (shares)						5,700,000	5,700,000
Series C and D Preferred Stock
Capital Unit [Line Items]
Redemption of preferred stock | $		$ 82,500
Loss on redemption of preferred stock | $		$ 2,800
Series C Preferred Stock
Capital Unit [Line Items]
Preferred stock, redemption price per share (in usd per share) | $ / shares		$ 25.00
Preferred stock, shares outstanding (shares)						0
Series D Preferred Stock
Capital Unit [Line Items]
Preferred stock, redemption price per share (in usd per share) | $ / shares		$ 25.00
Preferred stock, shares outstanding (shares)						0
Stated rate (as a percent)					6.50%
Series D Preferred Stock | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Spread on variable interest rate					5.09%
Series E Preferred Stock
Capital Unit [Line Items]
Stated rate (as a percent)				6.45%
Series E Preferred Stock | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Spread on variable interest rate				5.14%
Series F Preferred Stock
Capital Unit [Line Items]
Stated rate (as a percent)	6.00%
Series F Preferred Stock | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Spread on variable interest rate	4.762%