Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2013

Stockholders' Equity Note [Abstract]

Changes To Equity

Shares of our common stock outstanding and activity for the years ended December 31, 2013, 2012 and 2011 are presented below:

	Years Ended December 31,
	2013		2012		2011
	(In thousands)
Common shares outstanding at January 1	203,551,496		209,332,646		106,529,376
Common shares issued in connection with merger with Frontier	—		—		103,270,002
Issuance of restricted stock, excluding restricted stock with performance feature	292,855		691,207		512,880
Vesting of performance units	210,819		869,231		233,134
Vesting of restricted stock with performance feature	15,141		146,400		124,332
Forfeitures of restricted stock	(15,794	)	(3,975	)	(3,730	)
Purchase of treasury stock (1)	(5,224,166	)	(7,484,013	)	(1,333,348	)
Common shares outstanding at December 31	198,830,351		203,551,496		209,332,646

(1) Includes 235,922, 560,484 and 747,225 shares, respectively, withheld under the terms of stock-based compensation agreements to provide funds for the payment of payroll and income taxes due at the vesting of share-based award