Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Cash flows from operating activities:
Net income	$ 45,061	$ 20,988
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	5,158	5,794
Amortization of intangibles and other	28,489	25,530
Stock-based compensation	14,716	9,559
Loss on disposal of property	201	186
Deferred income taxes	(1,487)	3,518
Excess tax benefit from stock plans	0	(403)
Allowances for accounts receivable	140	53
Changes in operating assets and liabilities:
Accounts receivable	15,017	15,769
Other assets	4,465	3,783
Accounts payable and accrued liabilities	(20,290)	(10,971)
Income taxes payable	1,575	759
Deferred revenue	3,980	(1,394)
Net cash flows from operating activities	97,025	73,171
Cash flows from (used in) investing activities:
Purchases of investments	(8,258)	(30,482)
Sales and maturities of investments	18,495	25,904
Purchases of property and equipment	(5,968)	(865)
Payments for acquisitions, net of cash acquired	0	(77,149)
Proceeds from sale of property, plant and equipment, net	0	1,557
Net cash flows from (used in) investing activities	4,269	(81,035)
Cash flows used in financing activities:
Proceeds from stock-based compensation plans	7,943	7,245
Payments for taxes related to net share settlements of equity awards	(1,942)	(2,369)
Repurchases of common stock	(110,000)	(43,936)
Excess tax benefit from stock plans	0	403
Dividend payments to shareholders	(19,472)	(18,151)
Payment of long-term debt	(4,641)	(11,250)
Net cash flows used in financing activities	(128,112)	(68,058)
Effect of exchange rate changes on cash	(7,949)	13,643
Net decrease in cash and cash equivalents	(34,767)	(62,279)
Cash and cash equivalents, beginning of period	133,464	207,036
Cash and cash equivalents, end of period	98,697	144,757
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $889 in 2018 and $3,584 in 2017	7,515	10,469
Cash paid for interest	3,096	2,703
Non-cash investing and financing activities:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	9,546	13,833
Dividends declared	$ 6,324	$ 5,975