Goodwill and Intangibles (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 25, 2016 USD ($) acquisition	Dec. 27, 2015 USD ($)
Business Acquisition [Line Items]
Number of businesses acquired | acquisition		2
Payments to acquire businesses	$ 0	$ 40,410	$ 0
Goodwill [Roll Forward]
Goodwill, beginning balance	134,517	109,085
Business acquisitions		28,529
Foreign currency translation	9,230	(3,097)
Measurement period adjustment	(198)
Goodwill, ending balance	143,549	134,517	$ 109,085
HelloSociety, LLC and Fake Love, LLC [Member]
Business Acquisition [Line Items]
Payments to acquire businesses		15,400
Submarine Leisure Club, Inc. [Member]
Business Acquisition [Line Items]
Payments to acquire businesses		$ 25,000
Consulting and retention agreements, term		3 years
Miscellaneous Assets [Member]
Business Acquisition [Line Items]
Intangible assets, carrying value	$ 8,200
Minimum [Member]
Business Acquisition [Line Items]
Estimated useful life of intangible assets acquired	3 years
Maximum [Member]
Business Acquisition [Line Items]
Estimated useful life of intangible assets acquired	7 years