Recently Issue Accounting Standards Recently Issued Accounting Standards (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Accounting Changes [Abstract]
Cumulative effect of change in accounting for stock compensation forfeitures	$ 185,000
Payments Related to Tax Withholding for Share-based Compensation	$ 592,000	$ 8,000	$ 2,100,000	$ 3,100,000