Nature of Operations and Summary of Significant Accounting Policies - Net Income (Loss) Per Share and Fair Value (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) segment $ / shares shares
Net Income (Loss) Per Common Share
Number of outstanding units not included in computation of Diluted EPS (in shares)	140,000	1,074,375	150,000
Warrants exercise price | $ / shares	$ 57.47
Numerator:
Net income (loss) | $	$ 111,910	$ (8,515)	$ 340,099
Denominator:
Basic earnings per share weighted average shares (in shares)	50,348,000	50,195,000	50,932,000
Dilution due to stock options and restricted stock units (in shares)	405,000		443,000
Diluted earnings per share weighted average shares	50,753,000	50,195,000	51,375,000
Basic earnings (loss) per share (in dollars per share) | $ / shares	$ 2.22	$ (0.17)	$ 6.68
Diluted earnings (loss) per share (in dollars per share) | $ / shares	$ 2.20	$ (0.17)	$ 6.62
Fair Value of Financial Instruments
Fair value of long-term debt | $	$ 3,132,100	$ 3,244,000
Total long-term debt | $	$ 3,140,938	$ 3,236,002
Segment Reporting
Number of operating segments | segment			3
Number of reporting segments | segment	2
Warrants to purchase common stock
Net Income (Loss) Per Common Share
Number of outstanding units not included in computation of Diluted EPS (in shares)	78,000