Discontinued Operations - Assets And Liabilities Of Discontinued Operations On Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net	$ 217	$ 104
Deferred income tax assets	3,224	3,224
Total current assets	3,441	3,328
Deferred income tax assets	15,421	15,421
Other assets, net	1,499	1,680
Total assets of discontinued operations	20,361	20,429
Accounts payable	10	3
Accrued expenses	420	498
Remaining lease obligations	12,413	7,902
Total current liabilities	12,843	8,403
Remaining lease obligations	28,842	37,935
Total liabilities of discontinued operations	$ 41,685	$ 46,338