Investment in Affiliates, at Equity - Investment in Affiliate Exchange Rates (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity Method Investments and Joint Ventures [Abstract]
Summary of operations, weighted average rate	105.58	97.52	79.89
Balance sheet, year-end rate	119.46	105.15	86.01