Loan Transactions and Related Notes Receivable - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Jan. 15, 2009 First Credit Agreement	Jan. 30, 2009 Second Credit Agreement	Dec. 22, 2009 Third Credit Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amount	$ 10,000	$ 10,000	$ 10,000
Notes receivable, maturity	2014-01-15	2012-06-30	2014-12-22
Note receivable interest rate	12.00%	12.00%	12.00%
Notes receivable semi-annual installment, first payment		1,000	500
Notes receivable semi-annual installment, second payment		1,000	1,000
Notes receivable semi-annual installment, third payment		1,000	1,100
Notes receivable semi-annual installment, fourth payment		1,000	7,400
Notes receivable semi-annual installment, fifth payment		$ 6,000