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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Cash flows from operating activities:    
Net income $ 63,494 $ 62,061
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization of property and equipment 4,144 4,737
Amortization of acquired intangibles and other 33,988 17,984
Amortization of debt discount and issuance costs on Notes 4,942 0
Stock-based compensation 21,985 17,359
Non-cash lease expense 6,095 6,652
Loss on disposal of property and equipment 3 704
Deferred income taxes (1,596) 539
Allowances for bad debt and sales credits (370) 416
Changes in operating assets and liabilities:    
Accounts receivable (1,319) 13,622
Other assets 2,590 9,178
Accounts payable and accrued liabilities (5,994) (18,044)
Lease liabilities (6,440) (5,979)
Income taxes payable 3,079 793
Deferred revenue 10,001 (7,937)
Net cash flows from operating activities 134,602 102,085
Cash flows from (used in) investing activities:    
Purchases of investments 0 (5,009)
Sales and maturities of investments 4,150 14,901
Purchases of property and equipment (2,741) (3,419)
Decrease in escrow receivable and other 2,330 0
Net cash flows from investing activities 3,739 6,473
Cash flows from (used in) financing activities:    
Proceeds from stock-based compensation plans 9,247 9,027
Payments for taxes related to net share settlements of equity awards (2,398) (4,072)
Repurchases of common stock (35,000) (20,000)
Proceeds from issuance of senior convertible notes, net of issuance costs of $9,900 350,100 0
Purchase of capped calls (43,056) 0
Dividend payments to shareholders (23,372) (22,358)
Payment of principal on long-term debt (111,669) (7,525)
Payment of debt issuance costs (904) 0
Net cash flows from (used in) financing activities 142,948 (44,928)
Effect of exchange rate changes on cash 616 2,686
Net increase in cash and cash equivalents 281,905 66,316
Cash and cash equivalents, beginning of period 97,990 154,259
Cash and cash equivalents, end of period 379,895 220,575
Supplemental disclosure:    
Cash paid for income taxes, net of refunds of $807 in 2021 and $557 in 2020 9,920 7,052
Cash paid for interest 6,564 6,864
Non-cash investing and financing activities:    
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested 8,779 12,786
Dividends declared $ 7,988 $ 7,568