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Income Taxes - (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
subsidiary
Income Taxes  
Gross unrecognized tax benefits $ 14,600
Unrecognized tax benefits interest and penalties 0
Unrecognized tax benefits accrued interest and penalties $ 0
Number of partially owned subsidiaries | subsidiary 3
Federal income tax benefit or expense $ 0