Equity Equity, Textuals (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Preferred Stock, Shares Authorized		1,000,000	1,000,000
Common Stock, Shares Authorized		500,000,000	500,000,000	500,000,000
Common Stock, Shares, Outstanding		212,316,642	212,316,642	211,046,501
Treasury Stock, Shares		10,000	10,000	10,000
Treasury Stock, Shares, Acquired				15,294,567	19,752,174
Treasury Stock, Value, Acquired, Par Value Method				$ 184,900,000	$ 195,700,000
Treasury Stock Acquired, Average Cost Per Share				$ 12.09	$ 9.91
Stock Repurchase Program, Authorization Increase			155,000,000
Stock Repurchase Program, Authorized Amount			200,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount			190,100,000
Dividends declared per share	$ 0.08	$ 0.07	$ 0	$ 0	$ 0
Payments of Dividends, Common Stock			57,229,000	60,296,000	44,795,000
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent			0.20
Purchase of noncontrolling interest			$ 23,333,000	$ 3,000,000	$ 0
Sale of Stock, Percentage of Ownership before Transaction			70.00%
Sale of Stock, Percentage of Ownership after Transaction			90.00%