Acquisitions (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2016	Jun. 09, 2015
Business Acquisition [Line Items]
Goodwill	$ 292,390,000	$ 293,664,000
RBI
Business Acquisition [Line Items]
Aggregate purchase consideration			$ 147,585,000
Final purchase adjustment	$ 2,314,000
Goodwill			57,180,000
Goodwill, tax deductible amount			37,969,000
Indemnification asset			$ 3,000,000