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Capital Stock | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Capital Stock |
(13) | Capital Stock
We have authorized capital stock of 485.0 million shares, which includes 475.0 million shares of common stock and 10.0 million shares of preferred stock. The following is a schedule of changes in the number of common shares outstanding since the beginning of 2019:
| Year Ended December 31, |  |
| 2020 |  |  | 2019 |  |
Beginning balance |  | 249,630,803 |  |  |  | 249,510,022 |  |
Restricted stock grants |  | 3,390,358 |  |  |  | 1,186,290 |  |
Restricted stock units vested |  | 1,226,473 |  |  |  | 720,212 |  |
Performance stock units issued |  | 279,420 |  |  |  | 12,283 |  |
Performance stock dividends |  | 18,700 |  |  |  | 464 |  |
Treasury shares |  | (8,197,662 | ) |  |  | (1,798,468 | ) |
Ending balance |  | 246,348,092 |  |  |  | 249,630,803 |  |
Common Stock Dividends The board of directors declared quarterly dividends of $0.02 per common share for each of the four quarters of 2019 and 2018. In January 2020, we announced that the board had suspended the dividend. The determination of the amount of future dividends, if any, to be declared and paid is at the sole discretion of the board of directors and will depend on our financial condition, earnings, capital requirements, levels of indebtedness, our future business prospects and other matters our board of directors deem relevant. Our bank credit facility and our senior subordinated notes allow for the payment of common dividends, with certain limitations, as described in the indentures governing each of our notes. Stock Repurchase Program In October 2019, the board of directors approved a new stock purchase program to acquire up to $100 million of our outstanding stock. The following is a schedule of the change in treasury shares since the beginning of 2019:
| Year Ended December 31, |  |  |
| 2020 |  |  | 2019 |  |  |
Beginning balance |  | 1,808,133 |  |  |  | 9,665 |  |  |
Rabbi trust shares distributed and/or sold |  | (2,338 | ) |  |  | (1,532 | ) |  |
Shares repurchased |  | 8,200,000 |  |  |  | 1,800,000 |  |  |
Ending balance |  | 10,005,795 |  |  |  | 1,808,133 |  |  |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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