Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Cash flows from operating activities:
Net (loss) income	$ (55,726,000)	$ (8,801,000)	$ 49,458,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	8,506,000	9,394,000	9,775,000
Amortization of acquired intangibles and other	30,815,000	32,286,000	5,521,000
Stock-based compensation	22,541,000	24,004,000	24,873,000
Changes in fair value of contingent consideration obligation	0	(1,508,000)	89,000
Loss on sale of auction rate securities	0	0	2,554,000
Loss on disposal of property and equipment	370,000	41,000	60,000
Impairment of goodwill and long-lived assets	97,051,000	4,962,000	0
Deferred income taxes	1,307,000	(1,845,000)	15,034,000
Excess tax benefits from stock plans	(436,000)	(1,349,000)	(701,000)
Allowances for bad debt and sales credits	(479,000)	453,000	416,000
Changes in operating assets and liabilities:
Accounts receivable	647,000	3,747,000	(703,000)
Other assets	(3,925,000)	5,428,000	8,222,000
Accounts payable and accrued liabilities	(3,094,000)	(370,000)	(8,749,000)
Income taxes payable	109,000	2,481,000	710,000
Deferred revenue	5,159,000	35,617,000	1,135,000
Net cash flows from operating activities	102,845,000	104,540,000	107,694,000
Cash flows from investing activities:
Purchases of investments	(41,691,000)	(24,178,000)	(5,537,000)
Sales and maturities of investments	26,475,000	14,626,000	17,125,000
Redemptions and sales of auction rate securities - available-for-sale	0	0	26,196,000
Purchases of property and equipment	(5,786,000)	(7,184,000)	(7,985,000)
Capitalized software development costs	0	(1,661,000)	(3,816,000)
Payments for acquisitions, net of cash acquired	0	(246,275,000)	(24,493,000)
Proceeds from divestitures, net	0	4,500,000	3,300,000
Decrease in other noncurrent assets	0	(36,000)	346,000
Net cash flows (used in) from investing activities	(21,002,000)	(260,208,000)	5,136,000
Cash flows from financing activities:
Proceeds from stock-based compensation plans	9,918,000	13,069,000	16,488,000
Purchase of common stock related to withholding taxes from issuance of restricted stock units	(3,984,000)	(5,631,000)	(6,607,000)
Repurchase of common stock	(79,188,000)	(32,868,000)	(52,604,000)
Excess tax benefit from stock plans	436,000	1,349,000	701,000
Proceeds from the issuance of debt	0	150,000,000	0
Payment of long-term debt	(9,375,000)	(5,625,000)	0
Payment of contingent consideration	0	(1,785,000)	0
Payment of contingent consideration	0	209,000	210,000
Net cash flows (used in) from financing activities	(82,193,000)	118,300,000	(42,232,000)
Effect of exchange rate changes on cash	(4,993,000)	(13,335,000)	(6,334,000)
Net (decrease) increase in cash and equivalents	(5,343,000)	(50,703,000)	64,264,000
Cash and equivalents, beginning of year	212,379,000	263,082,000	198,818,000
Cash and equivalents, end of year	207,036,000	212,379,000	263,082,000
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $1,379 in 2016, $2,264 in 2015, and $1,769 in 2014	22,031,000	17,036,000	7,343,000
Cash paid for interest	3,157,000	2,725,000	0
Non-cash financing activity:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	17,213,000	18,714,000	20,093,000
Dividends declared	$ 6,067,000	$ 0	$ 0