Common Stock and Treasury Stock (Tables)

12 Months Ended

Dec. 31, 2013

Common Stock and Treasury Stock

Schedule of common stock and treasury stock activity

Our common stock and treasury stock activity during each of the three years 2013, 2012 and 2011 is as follows (dollars in thousands):

	Common Stock			Treasury Stock
	Shares	Amount		Shares		Amount
Balance at December 31, 2010	108,820,067	$	2,421,372	(50,410	)	$	(2,239	)
Common stock issuance	536,907	22,875		—		—
Purchase of treasury stock (a)	—	—		(88,440	)	(3,720		)
Reissuance of treasury stock for stock compensation	—	—		27,689		1,242
Balance at December 31, 2011	109,356,974	2,444,247		(111,161	)	(4,717		)
Common stock issuance	480,983	22,676		—		—
Purchase of treasury stock (a)	—	—		(89,629	)	(4,607		)
Reissuance of treasury stock for stock compensation	—	—		105,598		5,113
Balance at December 31, 2012	109,837,957	2,466,923		(95,192	)	(4,211		)
Common stock issuance	442,746	24,635		—		—
Purchase of treasury stock (a)	—	—		(174,290	)	(9,727		)
Reissuance of treasury stock for stock compensation	—	—		170,538		9,630
Balance at December 31, 2013	110,280,703	$	2,491,558	(98,944	)	$	(4,308	)

(a) Primarily represents shares of common stock withheld from certain stock awards for tax purposes.