Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ (47,439)	$ 4,069
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Goodwill and intangible asset impairment charge	29,548
Depreciation and amortization	3,397	1,877
Deferred income tax expense (benefit)	9,039	(1,688)
Loss on disposal of property and equipment	46	28
Stock-based compensation	1,630	1,431
Excess tax benefits from stock-based compensation		(13)
Changes in operating assets and liabilities:
Receivables	(298)	273
Inventories	429	(1,053)
Prepaid income taxes / income taxes payable	(311)	1,263
Prepaid expenses and other current assets	(384)	(525)
Trade accounts payable	545	(1,314)
Accrued compensation	341	(221)
Other accrued expenses and other current liabilities	(171)	1
Deferred income and customer deposits	1,283	3,888
Other long-term liabilities	669
Net cash provided by (used in) operating activities	(1,676)	8,016
Cash flows from investing activities:
Purchase of cost method investment		(2,000)
Purchases of marketable securities	(39,502)
Sales and maturities of marketable securities	9,500	2,100
Issuances of notes receivable	(500)	(500)
Purchases of property and equipment	(2,187)	(738)
Proceeds from sale of property and equipment	2
Net cash used in investing activities	(32,687)	(1,138)
Cash flows from financing activities:
Repurchases of common stock	(1,350)	(4,161)
Common stock repurchases to settle employee withholding liability	(28)
Payments of dividends	(5,180)	(2,845)
Principal payments on capital lease obligations	(15)	(15)
Excess tax benefits from stock-based compensation		13
Proceeds from employee stock plans		215
Net cash used in financing activities	(6,573)	(6,793)
Effect of exchange rate changes on cash	(19)	127
Net increase (decrease) in cash and cash equivalents	(40,955)	212
Cash and cash equivalents, beginning of period	70,161	107,982
Cash and cash equivalents, end of period	29,206	108,194
Supplemental disclosures of net cash paid during the period for:
Income taxes	$ 256	$ 2,936