Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:
Net income (loss)	$ (17,759)	$ 20,693	$ 6,769
Less: Income (loss) from discontinued operations, net of taxes	(373)	(1,935)	6,915
Income (loss) from continuing operations, net of taxes	(17,386)	22,628	(146)
Adjustments to reconcile income (loss) from continuing operations, net of taxes, to net cash provided by (used in) operating activities of continuing operations:
Stock-based compensation expense	470	1,487	523
Depreciation and amortization	3,214	16,728	2,809
Adjustment of deferred taxes		(15,105)	1,395
Loss on disposal of long-lived assets		819
Impairment of goodwill		192
Gain on release of foreign currency translation, net of taxes			(2,542)
Changes in current assets and liabilities:
Accounts receivable		(5,469)	(569)
Prepaid expenses and other current assets	6,554	(970)	2,835
Assets held for sale			6,216
Other assets	153	(132)	(802)
Accounts payable	(7,120)	1,903	177
Accrued expenses and other liabilities	(6,717)	(2,098)	(5,934)
Net loss attributable to non-controlling interest		(449)	(72)
Net cash provided by (used in) operating activities of continuing operations	(20,832)	19,534	3,890
Net cash provided by (used in) operating activities of discontinued operations	6,519	(847)	6,933
Net cash provided by (used in) operating activities	(14,313)	18,687	10,823
Cash Flows From Investing Activities:
Purchases of net assets in acquisitions		(52,567)	(36,530)
Purchases of property and equipment		(11,818)	(65)
Investment by non-controlling interest		75
Purchases of marketable securities	(198,403)	(523,443)	(537,898)
Sales of marketable securities	141,681	573,792	441,226
Maturities of marketable securities	49,536	64,253	92,321
Net cash provided by (used in) investing activities of continuing operations	(7,186)	50,292	(40,946)
Net cash provided by investing activities of discontinued operations	28,285
Net cash provided by (used in) investing activities	21,099	50,292	(40,946)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	2,169		29
Repurchases of common stock	(34,684)	(2,776)
Repayments of capital lease obligations		(230)
Repayments of long-term debt		(3,000)
Net cash provided by (used in) financing activities	(32,515)	(6,006)	29
Effect of foreign currency translation on cash and cash equivalents	57	96	305
Net increase (decrease) in cash and cash equivalents	(25,672)	63,069	(29,789)
Cash and cash equivalents, beginning balance	63,948	8,487	38,276
Cash and cash equivalents, ending balance	$ 38,276	$ 71,556	$ 8,487