Net Investment in Sales-Type Leases

Our sales-type leases are for terms generally ranging 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):



	March 31, 2013		December 31, 2012
Net minimum lease payments to be received	$	19,538	$	19,665
Less unearned interest income portion	1,185		1,205
Net investment in sales-type leases	18,353		18,460
Less current portion(1)	5,410		5,232
Non-current net investment in sales-type leases(2)	$	12,943	$	13,228

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

The minimum lease payments under sales-type leases as of March 31, 2013 were as follows (in thousands):



2013 (remaining nine months)	$	4,571
2014	5,245
2015	4,158
2016	2,899
2017	2,165
Thereafter	500
Total	$	19,538

The following table summarizes the credit losses and recorded investment in sales-type leases, excluding unearned interest, as of March 31, 2013 and December 31, 2012 (in thousands):



	Allowance for Credit Losses		Recorded Investment in Sales-type Leases Gross		Recorded Investment in Sales-type Leases Net
Credit loss disclosure for March 31, 2013:
Accounts individually evaluated for impairment	$	59	$	59	$	—
Accounts collectively evaluated for impairment	131		18,484		18,353
Ending balances: March 31, 2013	$	190	$	18,543	$	18,353
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 months ended March 31, 2013 and 2012 (in thousands):



	Three Months Ended March 31,
	2013			2012
Allowance for credit losses, beginning of period	$	607		$	284
Current period provision (reversal)	13			—
Direct write-downs charged against the allowance	(413		)	—
Recoveries of amounts previously charged off	(17		)	(27		)
Allowance for credit losses, end of period	$	190		$	257