Stockholders' Equity Repurchases of Common Stock (Details) (USD $)	0 Months Ended		1 Months Ended		12 Months Ended
	Dec. 11, 2013	Nov. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Stockholders' Equity Note [Abstract]
Treasury stock, shares acquired	600,000	256,262		873,146	600,000	1,129,408
Treasury stock acquired, average price paid per share	$ 13.18	$ 21.58	$ 24.26		$ 23.65
Stock repurchase program, remaining authorized repurchase amount	$ 62,074,000,000	$ 0	$ 0