Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2013

Financing Receivable, Allowance for Credit Losses [Line Items]

Allowance for credit losses and recorded investment in financing receivables

The following table summarizes the Company’s allowance for credit losses and recorded investment in financing receivables for the three months endedMarch 31, 2013 and 2012:

	Finance Leases			Notes Receivable			Total
Allowance for credit losses
Balance at January 1, 2013	$	525		$	2,047		$	2,572
Provision for credit losses	7			—			7
Recoveries	3			—			3
Write-offs	(75		)	(426		)	(501		)
Balance at March 31, 2013	$	460		$	1,621		$	2,081
Balance at January 1, 2012	$	210		$	2,047		$	2,257
Provision for credit losses	—			—			—
Recoveries	15			—			15
Write-offs	—			—			—
Balance at March 31, 2012	$	225		$	2,047		$	2,272

Summarizes the Company's aging of past-due notes receivable

The following table summarizes the Company’s aging of past-due notes receivable balances:

	March 31, 2013		December 31, 2012
30-59 days past due	$	—	$	—
60-89 days past due	—		—
> 89 days past due	1,482		1,840
Total past due	$	1,482	$	1,840