Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained (Deficit) Earnings	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2020		30,649,261
Balance at Dec. 31, 2020	$ 795,608	$ 6	$ 664,476	$ 49,227	$ 81,899
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(103,460)			(103,460)
Other comprehensive loss	(42,688)				(42,688)
Exercise of stock options (in shares)		16,471
Exercise of stock options	159		159
Vesting of RSUs (in shares)		109,198
Vesting of RSUs	(2,553)		(2,553)
Compensation expense under share incentive plans	1,905		1,905
Dividends on common shares	(9,343)			(9,343)
Balance (in shares) at Mar. 31, 2021		30,774,930
Balance at Mar. 31, 2021	$ 639,628	$ 6	663,987	(63,576)	39,211
Balance (in shares) at Dec. 31, 2021	37,373,066	37,373,066
Balance at Dec. 31, 2021	$ 725,362	$ 7	862,040	(166,663)	29,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10,205			10,205
Other comprehensive loss	(85,971)				(85,971)
Vesting of RSUs (in shares)		75,248
Vesting of RSUs	(922)		(922)
Compensation expense under share incentive plans	1,786		1,786
Dividends on Series A preferred shares	(875)			(875)
Dividends on common shares	$ (1,908)			(1,908)
Balance (in shares) at Mar. 31, 2022	37,448,314	37,448,314
Balance at Mar. 31, 2022	$ 647,677	$ 7	$ 862,904	$ (159,241)	$ (55,993)