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Prepaid Expenses and Other (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]    
Deposits on pending acquisitions $ 2,759 $ 2,641
Prepaid insurance 663 426
Income tax receivable   453
Other 1,889 1,201
Prepaid expenses and other $ 5,311 $ 4,721