Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Other Assets [Line Items]
Other assets	$ 22,632	$ 22,050
Cash in escrow
Other Assets [Line Items]
Other assets	1,310	748
Accounts receivable
Other Assets [Line Items]
Other assets	4,148	5,061
Income tax receivable
Other Assets [Line Items]
Other assets		69
Prepaid expenses
Other Assets [Line Items]
Other assets	3,509	3,106
Inventory
Other Assets [Line Items]
Other assets	903	877
Retained interest in entities
Other Assets [Line Items]
Other assets	11,042	10,707
Intangible assets
Other Assets [Line Items]
Other assets	175	310
Other assets
Other Assets [Line Items]
Other assets	$ 1,545	$ 1,172