Debt (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Debt Disclosure [Abstract]
Interest expense	$ 3,000	$ 1,700	$ 6,300	$ 4,100
Scheduled principal payments
2015	560		560
2016	9,752		9,752
2017	40,629		40,629
2018	1,265		1,265
2019	493,081		493,081
Thereafter	22,174		22,174
Total principal	$ 567,461		$ 567,461		$ 216,105