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Consolidated Statements of Cash Flows
$ in Thousands
 12 Months Ended
Nov. 30, 2018
USD ($)
Nov. 30, 2017
USD ($)
Nov. 30, 2016
USD ($)
Cash flows from operating activities:      
Net income (loss) $ 63,491 $ 37,417 $ (55,726)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization of property and equipment 6,941 7,526 8,506
Amortization of acquired intangibles and other 37,561 35,370 30,815
Stock-based compensation 20,569 14,153 22,541
Loss on disposal of property and equipment 390 416 370
Loss on assets held for sale 5,147 0 0
Impairment of goodwill and intangible assets 0 0 97,051
Deferred income taxes 2,035 474 1,307
Excess tax benefit from stock plans 0 (904) (436)
Allowances for bad debt and sales credits 262 46 (479)
Changes in operating assets and liabilities:      
Accounts receivable 2,072 6,442 647
Other assets (10,332) 2,813 (3,925)
Accounts payable and accrued liabilities (11,842) 673 (3,094)
Income taxes payable (2,890) 892 109
Deferred revenue 7,948 368 5,159
Net cash flows from operating activities 121,352 105,686 102,845
Cash flows from (used in) investing activities:      
Purchases of investments (8,258) (40,380) (41,691)
Sales and maturities of investments 23,101 31,559 26,475
Purchases of property and equipment (7,250) (3,377) (5,786)
Payments for acquisitions, net of cash acquired 0 (77,150) 0
Proceeds from sale of property, plant and equipment, net 0 1,557 0
Net cash flows from (used in) investing activities 7,593 (87,791) (21,002)
Cash flows used in financing activities:      
Proceeds from stock-based compensation plans 9,205 10,025 9,918
Payments for taxes related to net share settlements of equity awards (3,999) (3,756) (3,984)
Repurchases of common stock (120,000) (73,936) (79,188)
Dividend payments to shareholders (25,789) (24,127) 0
Excess tax benefit from stock plans 0 904 436
Payment of principal on long-term debt (6,188) (11,250) (9,375)
Payment of issuance costs for long-term debt 0 (1,174) 0
Net cash flows used in financing activities (146,771) (103,314) (82,193)
Effect of exchange rate changes on cash (10,512) 11,847 (4,993)
Net decrease in cash and cash equivalents (28,338) (73,572) (5,343)
Cash and cash equivalents, beginning of year 133,464 207,036 212,379
Cash and cash equivalents, end of year 105,126 133,464 207,036
Supplemental disclosure:      
Cash paid for income taxes, net of refunds of $909 in 2018, $3,997 in 2017, and $1,379 in 2016 25,451 25,992 22,031
Cash paid for interest 4,220 3,597 3,157
Non-cash investing and financing activities:      
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested 16,431 20,089 17,213
Dividends declared $ 6,998 $ 6,619 $ 6,067