Pending Merger with JAB (Details) - USD ($)	Apr. 25, 2017	Apr. 04, 2017	Mar. 28, 2017	Dec. 27, 2016
Common Class A [Member]
Pending Merger with JAB [Line Items]
Common Stock, Par or Stated Value Per Share			$ 0.0001	$ 0.0001
Common Class B [Member]
Pending Merger with JAB [Line Items]
Common Stock, Par or Stated Value Per Share			$ 0.0001	$ 0.0001
Subsequent Event [Member]
Pending Merger with JAB [Line Items]
Business Acquisition, Share Price		$ 315.00
Business Acquisition, Termination Fee		$ 215,000,000
Subsequent Event [Member] | Common Class A [Member]
Pending Merger with JAB [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Subsequent Event [Member] | Common Class B [Member]
Pending Merger with JAB [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001