Joint Venture Joint venture - goodwill impairment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Goodwill	$ 12,973		$ 12,973		$ 12,973
Goodwill, Impairment Loss		$ 0	0	$ 56,160
Corporate Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Goodwill	3,525		3,525
Goodwill, Impairment Loss	$ 1,763		$ 1,763