Subsequent Events	3 Months Ended
Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Settlement of Convertible Notes and Option Assets. On April 1, 2015, we paid holders of the Convertible Notes $273.8 million, comprised of a final coupon payment of $3.9 million, principal of $175.0 million and conversion premium of $94.9 million. Additionally on April 1, 2015, we received $94.9 million from the counterparties of the Option Assets in settlement of the Option Assets. The total net cash outflow related to the settlement of our Convertible Notes and Option Assets was $178.9 million. (See Note 3 for further details on our settlement of the Convertible Notes and Option Assets.) Authorization for Additional Share Repurchases. On April 14, 2015, our Board of Directors authorized an additional $100.0 million for share repurchases under our common stock share repurchase program. Repurchase transactions will occur at such times and prices as management deems appropriate and will be funded with our excess liquidity after giving consideration to internal and external growth opportunities and future cash flows. Repurchases may be in open-market transactions or in privately negotiated transactions, and the program may be modified or terminated by our Board of Directors at any time. As of April 27, 2015, $133.8 million remained available for repurchases of our common shares pursuant to the stock repurchase program. Dividend Declaration. On April 16, 2015, we announced that our Board of Directors declared a cash dividend of $0.40 per common share or approximately $6.9 million (including dividend equivalents), which will be paid on or about May 15, 2015 to stockholders of record at the close of business on April 27, 2015. Anti-dilution Adjustments to Warrants. Effective April 23, 2015, the ex-dividend date for the quarter’s dividend announced on April 16, 2015, the Warrants’ exercise price will be $60.44 per share.

Subsequent Events

Settlement of Convertible Notes and Option Assets. On April 1, 2015, we paid holders of the Convertible Notes $273.8 million, comprised of a final coupon payment of $3.9 million, principal of $175.0 million and conversion premium of $94.9 million. Additionally on April 1, 2015, we received $94.9 million from the counterparties of the Option Assets in settlement of the Option Assets. The total net cash outflow related to the settlement of our Convertible Notes and Option Assets was $178.9 million. (See Note 3 for further details on our settlement of the Convertible Notes and Option Assets.)

Authorization for Additional Share Repurchases. On April 14, 2015, our Board of Directors authorized an additional $100.0 million for share repurchases under our common stock share repurchase program. Repurchase transactions will occur at such times and prices as management deems appropriate and will be funded with our excess liquidity after giving consideration to internal and external growth opportunities and future cash flows. Repurchases may be in open-market transactions or in privately negotiated transactions, and the program may be modified or terminated by our Board of Directors at any time. As of April 27, 2015, $133.8 million remained available for repurchases of our common shares pursuant to the stock repurchase program.

Dividend Declaration. On April 16, 2015, we announced that our Board of Directors declared a cash dividend of $0.40 per common share or approximately $6.9 million (including dividend equivalents), which will be paid on or about May 15, 2015 to stockholders of record at the close of business on April 27, 2015.

Anti-dilution Adjustments to Warrants. Effective April 23, 2015, the ex-dividend date for the quarter’s dividend announced on April 16, 2015, the Warrants’ exercise price will be $60.44 per share.