Equity Equity, Textuals (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	May 09, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Repurchased During Period, Shares		0	0	(143)	0
Dividends declared per share	$ 0.07	$ 0.07	$ 0.06	$ 0.20	$ 0.17
Dividends, Common Stock, Cash				$ 14,800,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				190,100,000
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent				0.10
Payments to Acquire Additional Interest in Subsidiaries				$ 8,333,000	$ 0
Sale of Stock, Percentage of Ownership before Transaction				70.00%
Sale of Stock, Percentage of Ownership after Transaction				80.00%