Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Cash flows from operating activities:
Net income	$ 62,061	$ 31,140
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	4,737	5,523
Amortization of acquired intangibles and other	17,984	34,637
Stock-based compensation	17,359	17,411
Non-cash lease expense	6,652	0
Loss on disposal of property and equipment	704	157
Deferred income taxes	539	(6,005)
Allowances for bad debt and sales credits	416	153
Changes in operating assets and liabilities:
Accounts receivable	13,622	(8,604)
Other assets	9,178	6,034
Accounts payable and accrued liabilities	(18,044)	(3,875)
Lease liabilities	(5,979)	0
Income taxes payable	793	1,654
Deferred revenue	(7,937)	13,658
Net cash flows from operating activities	102,085	91,883
Cash flows from (used in) investing activities:
Purchases of investments	(5,009)	(8,900)
Sales and maturities of investments	14,901	21,780
Purchases of property and equipment	(3,419)	(1,830)
Payments for acquisitions, net of cash acquired	0	(225,298)
Proceeds from sale of property, plant and equipment, net	0	6,146
Net cash flows from (used in) investing activities	6,473	(208,102)
Cash flows (used in) from financing activities:
Proceeds from stock-based compensation plans	9,027	6,347
Payments for taxes related to net share settlements of equity awards	(4,072)	(1,637)
Repurchases of common stock	(20,000)	(25,000)
Dividend payments to shareholders	(22,358)	(20,819)
Proceeds from the issuance of debt	0	184,984
Payment of principle on long-term debt	(7,525)	(3,427)
Payment of issuance costs for long-term debt	0	(1,611)
Net cash flows (used in) from financing activities	(44,928)	138,837
Effect of exchange rate changes on cash	2,686	(3,724)
Net increase in cash and cash equivalents	66,316	18,894
Cash and cash equivalents, beginning of period	154,259	105,126
Cash and cash equivalents, end of period	220,575	124,020
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $557 in 2020 and $1,293 in 2019	7,052	4,821
Cash paid for interest	6,864	5,972
Non-cash investing and financing activities:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	12,786	8,190
Dividends declared	$ 7,568	$ 7,003