Other Assets Related party transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Assets [Abstract]
Revenues	$ 30,517	$ 20,217	$ 8,465
Expenses	$ 12,795	$ 15,669	$ 3,960