Note 12 - Financial Instruments - Swaps Outstanding (Details) - USD ($)	12 Months Ended
	Dec. 02, 2017	Oct. 20, 2017	Feb. 24, 2017	Oct. 07, 2015
Fair Value	$ (20,136,000)
Cross Currency Interest Rate Contract [Member]
Derivative, Notional Amount	533,624,000	$ 401,200,000	$ 42,600,000	$ 134,736,000
Fair Value	$ (20,136,000)
Cross Currency Interest Rate Contract [Member] | Currency Swap 1 [Member]
Fiscal Year of Expiration	2018
Interest rate minimum	3.45%
Derivative, Notional Amount	$ 44,912,000
Fair Value	$ (3,295,000)
Interest rate maximum	4.5374%
Interest rate minimum	3.45%
Interest rate maximum	4.5374%
Cross Currency Interest Rate Contract [Member] | Currency Swap 2 [Member]
Fiscal Year of Expiration	2019
Interest rate minimum	3.80%
Derivative, Notional Amount	$ 44,912,000
Fair Value	$ (4,054,000)
Interest rate maximum	5.053%
Interest rate minimum	3.80%
Interest rate maximum	5.053%
Cross Currency Interest Rate Contract [Member] | Currency Swap 3 [Member]
Fiscal Year of Expiration	2018
Interest rate minimum	1.95%
Derivative, Notional Amount	$ 42,600,000
Fair Value	$ (5,728,000)
Interest rate maximum	4.3038%
Interest rate minimum	1.95%
Interest rate maximum	4.3038%
Cross Currency Interest Rate Contract [Member] | Currency Swap 4 [Member]
Fiscal Year of Expiration	2018
Interest rate minimum	2.75%
Derivative, Notional Amount	$ 133,340,000
Fair Value	$ (2,184,000)
Interest rate maximum	4.933%
Interest rate minimum	2.75%
Interest rate maximum	4.933%
Cross Currency Interest Rate Contract [Member] | Currency Swap 5 [Member]
Fiscal Year of Expiration	2019
Interest rate minimum	3.00%
Derivative, Notional Amount	$ 267,860,000
Fair Value	$ (4,875,000)
Interest rate maximum	5.1803%
Interest rate minimum	3.00%
Interest rate maximum	5.1803%