Capital Stock

9 Months Ended

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.