Fair Value Measurements Fair Value Measurements (Details Textuals) - USD ($)	Dec. 27, 2016	Dec. 29, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		$ 2,000
Assets, Fair Value Disclosure, Recurring		2,000
Unrealized gains (losses) on cash flow hedging instruments	$ 2,216,000	2,552,000
Liabilities, Fair Value Disclosure, Recurring	2,216,000	2,552,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		2,000
Assets, Fair Value Disclosure, Recurring		2,000
Unrealized gains (losses) on cash flow hedging instruments	0	0
Liabilities, Fair Value Disclosure, Recurring	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		0
Assets, Fair Value Disclosure, Recurring		0
Unrealized gains (losses) on cash flow hedging instruments	2,216,000	2,552,000
Liabilities, Fair Value Disclosure, Recurring	2,216,000	2,552,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		0
Assets, Fair Value Disclosure, Recurring		0
Unrealized gains (losses) on cash flow hedging instruments	0	0
Liabilities, Fair Value Disclosure, Recurring	$ 0	$ 0