Stockholders' Equity - AOCI T2 rows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Accumulated Other Comprehensive Income (Loss)
Reclassifications, before tax	$ 126	$ 45	$ 557	$ 726
Reclassifications, tax (expense) benefit	(29)	(8)	(122)	(262)
Reclassifications, net of tax	97	37	435	464
Other changes, before reclassifications, before tax	168	(1,137)	2,679	(1,807)
Other changes, before reclassifications, tax (expense) benefit	(36)	407	(591)	644
Total other changes before reclassifications, net of tax	132	(730)	2,088	(1,163)
Total other comprehensive income (loss), net of tax	229	(693)	2,523	(699)
Gain (Loss) on Investments [Member]
Accumulated Other Comprehensive Income (Loss)
Reclassifications, before tax		(281)		(281)
Reclassifications, tax (expense) benefit		109		109
Reclassifications, net of tax		(172)		(172)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss)
Reclassifications, net of tax			435	464
Total other changes before reclassifications, net of tax			2,088	(1,163)
Total other comprehensive (loss) income, before tax	294	(1,092)	3,236	(1,081)
Total other comprehensive income (loss), tax	(65)	399	(713)	382
Total other comprehensive income (loss), net of tax	229	(693)	2,523	(699)
Unrealized Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss)
Reclassifications, net of tax			435	636
Other changes, before reclassifications, before tax	168	(1,087)	2,679	(2,052)
Other changes, before reclassifications, tax (expense) benefit	(36)	390	(591)	730
Total other changes before reclassifications, net of tax	132	(697)	2,088	(1,322)
Unrealized Gain (Loss) on Cash Flow Hedges | Interest Expense [Member]
Accumulated Other Comprehensive Income (Loss)
Reclassifications, before tax	126	326	557	1,007
Reclassifications, tax (expense) benefit	(29)	(117)	(122)	(371)
Reclassifications, net of tax	$ 97	209	$ 435	636
Mark-to-market foreign currency adjustment
Accumulated Other Comprehensive Income (Loss)
Other changes, before reclassifications, before tax		(11)		25
Other changes, before reclassifications, tax (expense) benefit		3		(9)
Total other changes before reclassifications, net of tax		(8)		16
Mark-to-market fair value adjustment
Accumulated Other Comprehensive Income (Loss)
Other changes, before reclassifications, before tax		(39)		220
Other changes, before reclassifications, tax (expense) benefit		14		(77)
Total other changes before reclassifications, net of tax		$ (25)		$ 143