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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Cash flows from operating activities:    
Net income $ 18,961 $ 21,116
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization of property and equipment 1,315 1,717
Amortization of acquired intangibles and other 10,547 5,952
Stock-based compensation 6,784 6,051
Non-cash lease expense 2,138 3,087
Loss on disposal of property and equipment 3 57
Deferred income taxes 656 1,967
Allowances for bad debt and sales credits (382) 236
Changes in operating assets and liabilities:    
Accounts receivable 10,841 9,810
Other assets 215 2,010
Accounts payable and accrued liabilities (17,762) (20,893)
Lease liabilities (2,258) (2,356)
Income taxes payable (1,469) 373
Deferred revenue 15,099 3,889
Net cash flows from operating activities 44,688 33,016
Cash flows from (used in) investing activities:    
Purchases of investments 0 (4,259)
Sales and maturities of investments 1,300 7,767
Purchases of property and equipment (1,166) (1,148)
Decrease in escrow receivable 2,130 0
Net cash flows from investing activities 2,264 2,360
Cash flows from (used in) financing activities:    
Proceeds from stock-based compensation plans 3,485 4,245
Payments for taxes related to net share settlements of equity awards (892) (1,949)
Repurchases of common stock (15,000) (20,000)
Dividend payments to shareholders (7,854) (7,468)
Payment of principal on long-term debt (18,763) (1,882)
Net cash flows used in financing activities (39,024) (27,054)
Effect of exchange rate changes on cash 1,780 (1,487)
Net increase in cash and cash equivalents 9,708 6,835
Cash and cash equivalents, beginning of period 97,990 154,259
Cash and cash equivalents, end of period 107,698 161,094
Supplemental disclosure:    
Cash paid for income taxes, net of refunds of $434 in 2021 and $196 in 2020 3,703 3,364
Cash paid for interest 2,283 2,588
Non-cash investing and financing activities:    
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested 2,088 4,652
Dividends declared $ 7,901 $ 7,465