Recently Issue Accounting Standards Recently Issued Accounting Standards (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 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
Stock compensation withheld - value	592,000	$ 8,000	$ 2,100,000	$ 3,100,000
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting for stock compensation forfeitures	185,000
Stock compensation withheld - value	$ 591,000	$ 8,000