FAIR VALUE MEASUREMENTS: (Tables)

3 Months Ended

Feb. 28, 2017

Fair Value Disclosures [Abstract]

Schedule of valuation of investments and financial instruments measured at fair value on recurring basis

The following table summarizes the valuation of the Company’s investments and financial instruments that are measured at fair value on a recurring basis:

	As of February 28, 2017								As of November 30, 2016
	Total		Fair value measurement category						Total		Fair value measurement category
			Level 1		Level 2		Level 3				Level 1		Level 2		Level 3
Assets:
Cash equivalents	$	38,881	$	38,881	$	—	$	—	$	43,043	$	43,043	$	—	$	—
Available-for-sale securities	2,079		2,079		—		—		1,883		1,883		—		—
Forward foreign currency exchange contracts	901		—		901		—		1,700		—		1,700		—
Liabilities:
Forward foreign currency exchange contracts	$	1,188	$	—	$	1,188	$	—	$	979	$	—	$	979	$	—
Interest rate swaps	5,332		—		5,332		—		7,248		—		7,248		—