Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	May 31, 2020	May 31, 2019
Cash flows from operating activities:
Net income	$ 38,084	$ 17,583
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	3,248	3,438
Amortization of acquired intangibles and other	11,993	19,900
Stock-based compensation	11,674	11,922
Non-cash lease expense	4,907
Loss on disposal of property and equipment	531	(18)
Deferred income taxes	1,944	(6,707)
Allowances for bad debt and sales credits	274	287
Changes in operating assets and liabilities:
Accounts receivable	18,369	10,859
Other assets	4,968	7,722
Accounts payable and accrued liabilities	(18,664)	(4,627)
Lease liabilities	(4,076)
Income taxes payable	940	1,937
Deferred revenue	(3,219)	2,822
Net cash flows from operating activities	70,973	65,118
Cash flows from (used in) investing activities:
Purchases of investments	(5,009)	(5,750)
Sales and maturities of investments	14,051	14,709
Purchases of property and equipment	(1,757)	(1,080)
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	7,285	(211,273)
Cash flows (used in) from financing activities:
Proceeds from stock-based compensation plans	7,308	4,303
Payments for taxes related to net share settlements of equity awards	(3,895)	(1,637)
Repurchases of common stock	(20,000)	(25,000)
Dividend payments to shareholders	(14,906)	(13,886)
Proceeds from the issuance of debt	0	184,984
Payment of principle on long-term debt	(3,762)	(1,547)
Payment of issuance costs for long-term debt	0	(1,611)
Net cash flows (used in) from financing activities	(35,255)	145,606
Effect of exchange rate changes on cash	(4,040)	(1,328)
Net increase (decrease) in cash and cash equivalents	38,963	(1,877)
Cash and cash equivalents, beginning of period	154,259	105,126
Cash and cash equivalents, end of period	193,222	103,249
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $239 in 2020 and $176 in 2019	4,587	4,242
Cash paid for interest	4,898	2,990
Non-cash investing and financing activities:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	12,090	8,063
Dividends declared	$ 7,539	$ 6,944