Net Investment in Sales-Type Leases

Our sales-type leases are for terms generally up to five years. Sales-type lease receivables are collateralized by the underlying equipment. The components of our net investment in sales-type leases are as follows (in thousands):



	September 30, 2013		December 31, 2012
Net minimum lease payments to be received	$	18,788	$	19,665
Less unearned interest income portion	1,157		1,205
Net investment in sales-type leases	17,631		18,460
Less current portion(1)	5,233		5,232
Non-current net investment in sales-type leases(2)	$	12,398	$	13,228

(1) A component of other current assets. This amount is net of allowance for doubtful accounts of $0.1 million as of September 30, 2013 and $0.5 million as of December 31, 2012.

(2) This amount is net of allowance for doubtful accounts of $0.1 million as of September 30, 2013 and $0.1 million as of December 31, 2012.

The minimum lease payments under sales-type leases as of September 30, 2013 were as follows (in thousands):



2013 (remaining three months)	$	1,640
2014	5,495
2015	4,536
2016	3,341
2017	2,603
Thereafter	1,173
Total	$	18,788

The following table summarizes the credit losses and recorded investment in sales-type leases, excluding unearned interest (in thousands):



	Allowance for Credit Losses		Recorded Investment in Sales-type Leases Gross		Recorded Investment in Sales-type Leases Net
Credit loss disclosure for September 30, 2013:
Accounts individually evaluated for impairment	$	22	$	22	$	—
Accounts collectively evaluated for impairment	152		17,783		17,631
Ending balances: September 30, 2013	$	174	$	17,805	$	17,631
Credit loss disclosure for December 31, 2012:
Accounts individually evaluated for impairment	$	489	$	489	$	—
Accounts collectively evaluated for impairment	118		18,578		18,460
Ending balances: December 31, 2012	$	607	$	19,067	$	18,460

The following table summarizes the activity for the allowance for credit losses for the investment in sales-type leases for the three and nine months ended September 30, 2013 and 2012 (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Allowance for credit losses, beginning of period	$	184		$	659		$	607		$	284
Current period provision	15			4			34			426
Direct write-downs charged against the allowance	—			—			(413		)	—
Recoveries of amounts previously charged off	(25		)	(26		)	(54		)	(73		)
Allowance for credit losses, end of period	$	174		$	637		$	174		$	637