Net Deferred Tax Asset (Liability) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Net operating loss and capital loss carryforward - 382 limited	$ 97,760	$ 85,306
Net operating loss carryforward - not 382 limited	35,811	31,236
State net operating loss carryforward, net	4,345	4,719
Capital loss carryforward - not 382 limited	44,806	5,039
Company basis difference	18,958	65,482
Reserves and accruals	5,563	3,175
Equity-based compensation expense	9,196	7,450
AMT and other credits	582	582
Other, net	1,348	2,684
Total deferred tax assets	218,369	205,673
Valuation allowance	(162,283)	(168,355)
Deferred tax asset	56,086	37,318
Deferred tax liabilities:
Intangible assets	(25,968)	(4,765)
Total deferred tax liabilities	(25,968)	(4,765)
Total net deferred tax assets	$ 30,118	$ 32,553