Organization and Basis of Presentation Prior period adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Prior Period Adjustments [Line Items]
Cash outflow for shares related to tax withholdings	$ 4,624	$ 44,926
Development service fee expense	$ 11,004	0
Other Income [Member] | Scenario, Previously Reported [Member]
Prior Period Adjustments [Line Items]
Development service fee income		1,372
General and Administrative Expense [Member] | Scenario, Previously Reported [Member]
Prior Period Adjustments [Line Items]
Development service fee expense		1,098
Accounting Standards Update 2016-09 [Member] | Scenario, Previously Reported [Member]
Prior Period Adjustments [Line Items]
Cash outflow for shares related to tax withholdings		$ 4,000