ALLOWANCE FOR CREDIT LOSSES

Trade Receivables The Company evaluates the collectability of trade receivables based on (1) a percentage of sales related to historical loss experience and current trends and (2) periodic adjustments for known events such as specific customer circumstances and changes in the aging of accounts receivable balances. After all efforts at collection have been unsuccessful, the account is deemed uncollectible and is written off.

Financing Receivables The Company evaluates the collectability of notes and finance lease receivables (collectively, financing receivables) on a customer-by-customer basis and evaluates specific customer circumstances, aging of invoices, credit risk changes and payment patterns and historical loss experience. When the collectability is determined to be at risk based on the above criteria, the Company records the allowance for credit losses which represents the Company’s current exposure less estimated reimbursement from insurance claims. After all efforts at collection have been unsuccessful, the account is deemed uncollectible and is written off.

The following table summarizes the Company’s allowance for credit losses and amount of financing receivables evaluated for impairment:



	Finance Leases			Notes Receivable			Total
Allowance for credit losses
Balance at January 1, 2011	$	378		$	470		$	848
Provision for credit losses	107			2,078			2,185
Recoveries	138			5,455			5,593
Write-offs	(413		)	(5,956		)	(6,369		)
Balance at December 31, 2011	$	210		$	2,047		$	2,257
Provision for credit losses	263			—			263
Recoveries	52			—			52
Write-offs	—			—			—
Balance at December 31, 2012	$	525		$	2,047		$	2,572

The Company's allowance of $2,572 and $2,257 for the years ended December 31, 2012 and 2011, respectively, all resulted from individual impairment evaluation. As of December 31, 2012, finance leases and notes receivables individually evaluated for impairment were $78,181 and $12,855, respectively. As of December 31, 2011, finance leases and notes receivables individually evaluated for impairment were $98,506 and $13,869, respectively.

The Company records interest income and any fees or costs related to financing receivables using the effective interest method over the term of the lease or loan. The Company reviews the aging of its financing receivables to determine past due and delinquent accounts. Credit quality is reviewed at inception and is re-evaluated as needed based on customer specific circumstances. Receivable balances 60 days to 89 days past due are reviewed and may be placed on nonaccrual status based on customer-specific circumstances. Receivable balances are placed on nonaccrual status upon reaching great than 89 days past due. Upon receipt of payment on nonaccrual financing receivables, interest income is recognized and accrual of interest is resumed once the account has been made current or the specific circumstances have been resolved.

As of December 31, 2012 and 2011, the recorded investment in past-due finance lease receivables on nonaccrual status was $2,060 and $1,740, respectively. The recorded investment in finance lease receivables past due 90 days or more and still accruing interest was $0 and $114 as of December 31, 2012 and 2011, respectively. The recorded investment in impaired notes receivable was $2,047 and was fully reserved as of December 31, 2012 and 2011, respectively.

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



	December 31,
	2012		2011
30-59 days past due	$	—	$	—
60-89 days past due	—		—
> 89 days past due	1,840		1,495
Total past due	$	1,840	$	1,495