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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Cash flows from operating activities:    
Net (loss) income $ (525) $ 3,216
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization of property and equipment 1,978 2,230
Amortization of intangibles and other 7,382 7,710
Stock-based compensation 1,630 6,937
Deferred income taxes 4,268 (516)
Excess tax benefit from stock plans (183) (63)
Allowances for accounts receivable 40 (136)
Changes in operating assets and liabilities:    
Accounts receivable 16,937 7,695
Other assets (2,278) (4,462)
Accounts payable and accrued liabilities (989) (11,167)
Income taxes payable 55 46
Deferred revenue 8,985 11,012
Net cash flows from operating activities 37,300 22,502
Cash flows from (used in) investing activities:    
Purchases of investments (854) (22,258)
Sales and maturities of investments 6,155 3,185
Purchases of property and equipment (383) (1,414)
Net cash flows from (used in) investing activities 4,918 (20,487)
Cash flows used in financing activities:    
Proceeds from stock-based compensation plans 2,770 3,670
Purchases of stock related to withholding taxes from the issuance of restricted stock units (1,306) (409)
Repurchases of common stock (15,190) (9,041)
Excess tax benefit from stock plans 183 63
Dividend payments to shareholders (6,072) 0
Payment of long-term debt (3,750) (3,750)
Net cash flows used in financing activities (23,365) (9,467)
Effect of exchange rate changes on cash 1,018 (1,223)
Net increase (decrease) in cash and cash equivalents 19,871 (8,675)
Cash and cash equivalents, beginning of period 207,036 212,379
Cash and cash equivalents, end of period 226,907  
Supplemental disclosure:    
Cash (refunded) paid for income taxes, net of refunds of $2,121 in 2017 and $442 in 2016 (209) 5,587
Cash paid for interest 844 765
Non-cash financing activities:    
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested 9,393 4,368
Unsettled repurchases of common stock 2,894 2,645
Dividends declared $ 6,037 $ 0