Other Assets Equity Method Investee (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Assets [Abstract]
Current Assets	$ 382,529	$ 315,264
Non Current Assets	2,922,471	2,246,809
Total Assets	3,305,000	2,562,073
Current Liabilities	761,331	585,887
Non Current Liabilities	1,693,941	1,231,262
Total Liabilities	2,455,272	1,817,149
Noncontrolling Interest	1,544	1,683
Total Revenues	1,232,191	990,172	$ 797,441
Total Expenses	(972,454)	(830,898)	(682,430)
Net Income	$ 259,737	$ 159,274	$ 115,011