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Capital Stock | 9 Months Ended
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Sep. 30, 2019
Equity [Abstract] |
Capital Stock | (16) 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. We currently have no preferred stock issued or outstanding. The following is a schedule of changes in the number of common shares outstanding since the beginning of 2018:
|  | Nine Months Ended September 30, 2019 |  |  | Year Ended December 31, 2018 |
Beginning balance |  |  | 249,510,022 |  |  |  | 248,129,430 |
Restricted stock grants |  |  | 1,178,732 |  |  |  | 865,095 |
Restricted stock units vested |  |  | 714,271 |  |  |  | 434,046 |
Performance stock units issued |  |  | 12,283 |  |  |  | 73,985 |
Performance stock dividends |  |  | 464 |  |  |  | 2,164 |
Treasury shares issued |  |  | 1,532 |  |  |  | 5,302 |
Ending balance |  |  | 251,417,304 |  |  |  | 249,510,022 |
In October 2019, our board of directors authorized an $100.0 million common stock repurchase program. Under this stock repurchase program, we may repurchase shares in open market transactions, from time to time, in accordance with applicable SEC rules and federal securities laws. The stock repurchase program has no time limit and may be modified, suspended or terminated at any time by our board of directors.

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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://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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