Impairment of Long-Lived Assets Impairment of Long-Lived Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 1,179		$ 17,139
Impairment of Long-Lived Assets to be Disposed of	758	332	2,474
Impairment of long-lived assets	1,937	2,529	19,613
Restaurants leased or subleased to franchisees
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	705	2,197
Company-owned restaurants
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 474	$ 0