Contingencies (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Percentage revenue representation for investigation of sales practices (less than 1%)	1.00%	1.00%	1.00%	1.00%