Recently Issue Accounting Standards Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting for stock compensation forfeitures	$ 0
Payments Related to Tax Withholding for Share-based Compensation	592	$ 8	$ 2,100	$ 3,100
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting for stock compensation forfeitures	185
Payments Related to Tax Withholding for Share-based Compensation	$ 591	$ 8