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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Class A common stock | Class A common stock Common stock | Class A common stock Treasury Stock | Class A common stock Retained Earnings | Class B common stock | Class B common stock Common stock | Class B common stock Retained Earnings
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 | $ 786,760 | $ 732,854 | $ 625,356 | $ 1,307 |  | $ 635 | $ (573,513) |  |  | $ 121 |
Beginning Balance, Shares at Dec. 31, 2017 |  |  |  |  |  | 63,457 | 32,290 |  |  | 12,029 |
Shares awarded under stock compensation plans | 352 | 345 |  |  |  | $ 7 |  |  |  |  |
Shares awarded under stock compensation plans, shares |  |  |  |  |  | 740 |  |  |  |  |
Purchases of treasury stock | (24,110) |  |  |  |  |  | $ (24,110) |  |  |  |
Purchases of treasury stock, shares |  |  |  |  |  |  | (1,186) |  |  |  |
Change in fair value of interest rate swap and rate cap agreements net of tax expense | 1,284 |  |  | 1,284 |  |  |  |  |  |  |
Pension accrual income, net of tax | 1,642 |  |  | 1,642 |  |  |  |  |  |  |
Restricted stock amortization | 11,853 | 11,853 |  |  |  |  |  |  |  |  |
Net income (loss) | 51,650 |  | 51,650 |  |  |  |  |  |  |  |
Stockholders' Equity, Other |  |  | 3,918 |  |  |  |  |  |  |  |
Dividends declared | (7,346) |  |  |  |  |  |  | $ (7,346) | $ (2,887) |  | $ (2,887)
Ending Balance at Dec. 31, 2018 | 823,116 | 745,052 | 670,691 | 4,233 |  | $ 642 | $ (597,623) |  |  | $ 121 |
Ending Balance, Shares at Dec. 31, 2018 |  |  |  |  |  | 64,197 | 33,476 |  |  | 12,029 |
Shares awarded under stock compensation plans | 60 | 55 |  |  |  | $ 5 |  |  |  |  |
Shares awarded under stock compensation plans, shares |  |  |  |  |  | 537 |  |  |  |  |
Purchases of treasury stock | (2,381) |  |  |  |  |  | $ (2,381) |  |  |  |
Purchases of treasury stock, shares |  |  |  |  |  |  | (153) |  |  |  |
Change in fair value of interest rate swap and rate cap agreements net of tax expense | (4,359) |  |  | (4,359) |  |  |  |  |  |  |
Pension accrual income, net of tax | (1,936) |  |  | (1,936) |  |  |  |  |  |  |
Restricted stock amortization | 10,797 | 10,797 |  |  |  |  |  |  |  |  |
Net income (loss) | 144,137 |  | 144,137 |  |  |  |  |  |  |  |
Stockholders' Equity, Other |  |  | (7,428) |  |  |  |  |  |  |  |
Dividends declared |  |  |  |  | $ (12,430) |  |  | (12,430) | (4,812) |  | (4,812)
Ending Balance at Dec. 31, 2019 | 944,764 | 755,904 | 790,158 | (2,062) |  | $ 647 | $ (600,004) |  |  | $ 121 |
Ending Balance, Shares at Dec. 31, 2019 |  |  |  |  |  | 64,734 | 33,629 |  |  | 12,029 |
Shares awarded under stock compensation plans | 0 | (9) |  |  |  | $ 9 |  |  |  |  |
Shares awarded under stock compensation plans, shares |  |  |  |  |  | 874 |  |  |  |  |
Purchases of treasury stock | (71,721) |  |  |  |  |  | $ (71,721) |  |  |  |
Purchases of treasury stock, shares |  |  |  |  |  |  | (2,181) |  |  |  |
Change in fair value of interest rate swap and rate cap agreements net of tax expense | (218) |  |  | (218) |  |  |  |  |  |  |
Pension accrual income, net of tax | (1,336) |  |  | (1,336) |  |  |  |  |  |  |
Restricted stock amortization | 11,704 | 11,704 |  |  |  |  |  |  |  |  |
Net income (loss) | (51,385) |  |  |  |  |  |  |  |  |  |
Dividends declared | (12,191) |  |  |  |  |  |  | $ (12,191) | $ (4,812) |  | $ (4,812)
Ending Balance at Dec. 31, 2020 | $ 814,805 | $ 767,599 | $ 721,770 | $ (3,616) |  | $ 656 | $ (671,725) |  |  | $ 121 |
Ending Balance, Shares at Dec. 31, 2020 |  |  |  |  |  | 65,608 | 35,810 |  |  | 12,029 |

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