Condensed Consolidated Statements of Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common Stock - Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance (in shares) at Dec. 31, 2020		39,334,839
Beginning Balance at Dec. 31, 2020	$ 1,173,955	$ 5	$ 392,247	$ 891,211	$ 1,160	$ (110,668)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)		254,396
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(10,026)					(10,026)
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased) (in shares)		4,673
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased)	(1,607)		(176)			(1,431)
Equity issuance (net of issuance costs) (in shares)		5,750,000
Equity issuance (net of issuance costs)	365,280	$ 1	365,279
Settlement of 2036 convertible senior notes conversion, net of tax impact (in shares)		2,195,836
Settlement of 2036 convertible senior notes conversion, net of tax impact	(3,237)		(26,183)			22,946
Stock compensation expense	1,844		1,844
Other comprehensive income (loss)	(1,510)				(1,510)
Net income	39,222			39,222
Ending Balance (in shares) at Mar. 31, 2021		47,539,744
Ending Balance at Mar. 31, 2021	1,563,921	$ 6	733,011	930,433	(350)	(99,179)
Beginning Balance (in shares) at Dec. 31, 2021		50,294,505
Beginning Balance at Dec. 31, 2021	1,727,826	$ 6	709,186	1,105,030	(2,111)	(84,285)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)		143,068
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(4,538)					(4,538)
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased) (in shares)		31,883
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased)	(789)		(475)			(314)
Stock compensation expense	2,256		2,256
Other comprehensive income (loss)	(3,259)				(3,259)
Net income	12,477			12,477
Ending Balance (in shares) at Mar. 31, 2022		50,469,456
Ending Balance at Mar. 31, 2022	$ 1,733,973	$ 6	$ 710,967	$ 1,117,507	$ (5,370)	$ (89,137)