Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents	$ 96,894	$ 135,583	$ 137,228	$ 119,923
Restricted Cash	38,572	44,370
Joint Venture [Member]
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents	72,792	94,737
Corporate non-segment [Member]
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents	$ 24,102	$ 40,846