INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2021	$ 694,024	$ 65,988	$ 347,902	$ 370,927	$ (90,793)
Balance (in shares) at Dec. 31, 2021		66,037,000
Shares issued on grants of performance share units		$ 95	(95)
Shares issued on grants of performance share units (in shares)		95,000
Stock compensation expense	949		949
Net income (loss)	88,897			88,897
Dividends declared	(4,960)			(4,960)
Other comprehensive income (loss)	(10,576)				(10,576)
Balance at Mar. 31, 2022	768,334	$ 66,083	348,756	454,864	(101,369)
Balance (in shares) at Mar. 31, 2022		66,132,000
Balance at Dec. 31, 2022	$ 838,784	$ 66,132	354,495	598,119	(179,962)
Balance (in shares) at Dec. 31, 2022	66,167,000	66,167,000
Shares issued on grants of performance share units		$ 254	(254)
Shares issued on grants of performance share units (in shares)		254,000
Stock compensation expense	$ 1,226		1,226
Net income (loss)	(30,578)			(30,578)
Dividends declared	(4,982)			(4,982)
Other comprehensive income (loss)	18,423				18,423
Balance at Mar. 31, 2023	$ 822,873	$ 66,386	$ 355,467	$ 562,559	$ (161,539)
Balance (in shares) at Mar. 31, 2023	66,421,000	66,421,000