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Stock-Based Compensation - Performance-Based Stock Grants (Details)		12 Months Ended
	Sep. 23, 2020 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based award vesting period		5 years
Weighted-Average Grant-Date Fair Value
Number of share to vest | shares	0
Shares
Nonvested at the beginning of the period (in shares) | shares		25,000	79,560	81,608	72,109
Granted (in shares) | shares		94,654	117,279	149,496
Vested (in shares) | shares		(138,635)	(119,327)	(108,610)
Forfeited or unearned (in shares) | shares		(10,579)	0	(31,387)
Nonvested at the beginning of the period, weighted-average grant-date fair value (in usd per share) | $ / shares		$ 7.23	$ 8.08	$ 8.35	$ 7.76
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares		7.23	8.08	8.35	$ 7.76
Granted, weighted-average grant-date fair value (in usd per share) | $ / shares		9.03	8.34	9.38
Vested, weighted-average grant-date fair value (in usd per share) | $ / shares		8.91	8.52	9.04
Forfeited or unearned, weighted-average grant-date fair value (in usd per share) | $ / shares		$ 8.99	$ 0	$ 9.55
Minimum
Weighted-Average Grant-Date Fair Value
Percentage of number of share earned of target share granted	50
Maximum
Weighted-Average Grant-Date Fair Value
Percentage of number of share earned of target share granted	200
Shares Underlying Stock Options Excluded | Class A Non-Voting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based award vesting period		3 years
Weighted-Average Grant-Date Fair Value
Stock option vesting per year (percent)		33.00%
Shares
Share-based compensation expense | $		$ 375,000	$ 617,000	$ 1,397,000
Unearned compensation cost | $		$ 162,000
2019 Replacement Awards
Weighted-Average Grant-Date Fair Value
Stock option vesting per year (percent)	50.00%
Percentage of stock units awards vested of targeted shares		200.00%
Vesting date	December 31, 2021
Shares
Vested (in shares) | shares		(135,309)
2019 Replacement Awards | Minimum
Weighted-Average Grant-Date Fair Value
Total shareholder return	10
2020 Replacement Awards
Weighted-Average Grant-Date Fair Value
Stock option vesting per year (percent)	100.00%
Vesting date	December 31, 2022
2020 Replacement Awards | Minimum
Weighted-Average Grant-Date Fair Value
Total shareholder return	20
Performance Stock Grants Excluded because Performance Conditions Have Not Been Met | Class A Non-Voting
Shares
Nonvested at the beginning of the period (in shares) | shares		1,176,391	899,271	973,779	988,837
Granted (in shares) | shares		935,825	1,616,902	626,776
Vested (in shares) | shares		(507,191)	(224,681)	(214,824)
Forfeited or unearned (in shares) | shares		(151,514)	(1,466,729)	(427,010)
Nonvested at the beginning of the period, weighted-average grant-date fair value (in usd per share) | $ / shares		$ 8.25	$ 8.19	$ 8.38	$ 8.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares		8.25	8.19	8.38	$ 8.07
Granted, weighted-average grant-date fair value (in usd per share) | $ / shares		8.38	8.01	8.87
Vested, weighted-average grant-date fair value (in usd per share) | $ / shares		8.85	8.33	8.49
Forfeited or unearned, weighted-average grant-date fair value (in usd per share) | $ / shares		$ 6.52	$ 8.10	$ 8.34
Fair value of performance shares vested | $		$ 4,487,000	$ 1,871,000	$ 1,823,000
Share-based compensation expense | $		5,712,000	$ 2,382,000	$ 1,082,000
Unearned compensation cost | $		$ 5,180,000

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