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Shareholders' Equity
 6 Months Ended
Jun. 30, 2017
Equity [Abstract]  
Shareholders' Equity
Shareholders’ Equity

During the first and second quarters of 2017, we declared a cash dividend on our common stock of $0.48 per share which was paid in April 2017 and July 2017, respectively. During the first quarter of 2017, we also paid a cash dividend on our common stock of $0.48 per share which was declared during the fourth quarter of 2016.

During the first and second quarters of 2016, we declared and paid a cash dividend on our common stock of $0.375 per share. During the first quarter of 2016, we also paid a cash dividend on our common stock of $0.375 per share which was declared during the fourth quarter of 2015.

In April 2017, our board of directors authorized a 12-month common stock repurchase program for up to $500 million. The timing and number of shares purchased will depend on a variety of factors including price and market conditions. Repurchases under the program may be made at management's discretion from time to time on the open market or through privately negotiated transactions. As of June 30, 2017, we have not made any purchases under this program.