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Net Investment in Sales-Type Leases (Tables)
 9 Months Ended
Sep. 30, 2012
Capital Leases, Net Investment in Sales Type Leases [Abstract]  
sales type lease investment [Table Text Block]
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):
 
September 30,
2012
 
December 31,
2011
Net minimum lease payments to be received
$
16,395

 
$
15,063

Less unearned interest income portion
1,378

 
1,229

Net investment in sales-type leases
15,017

 
13,834

Less current portion(1)
4,389

 
5,049

Non-current net investment in sales-type leases(2)
$
10,628

 
$
8,785
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
The minimum lease payments under sales-type leases as of September 30, 2012 were as follows (in thousands):
2012 (remaining three months)
$
1,087

 
2013
5,152

 
2014
4,028

 
2015
2,973

 
2016
1,927

 
2017
1,055

 
Thereafter
173

 
Total
$
16,395

 
Allowance for Credit Losses on Financing Receivables [Table Text Block]
The following table summarizes the credit losses and recorded investment in sales-type leases, excluding unearned interest, as of September 30, 2012 and December 31, 2011 (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, 2012 :
 

 
 

 
 

Accounts individually evaluated for impairment
$
518

 
$
518

 
$
—

Accounts collectively evaluated for impairment
119

 
15,136

 
15,017

Ending balances: September 30, 2012
$
637

 
$
15,654

 
$
15,017

Credit loss disclosure for December 31, 2011 :
 

 
 

 
 

Accounts individually evaluated for impairment
$
178

 
$
178

 
$
—

Accounts collectively evaluated for impairment
106

 
13,940

 
13,834

Ending balances: December 31, 2011
$
284

 
$
14,118

 
$
13,834
Schedule of Credit Losses Related to Financing Receivables, Noncurrent [Table Text Block]
The following table summarizes the activity for the allowance for credit losses for the investment in sales-type leases for the three months and nine months ended September 30, 2012 and 2011 (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2012
 
2011
 
2012
 
2011
Allowance for credit losses, beginning of period
$
659

 
$
353

 
$
284

 
$
411

Current period provision (reversal)
4

 
(7
)
 
426

 
(16
)
Direct write-downs charged against the allowance
—

 
—

 
—

 
—

Recoveries of amounts previously charged off
(26
)
 
(24
)
 
(73
)
 
(73
)
Allowance for credit losses, end of period
$
637

 
$
322

 
$
637

 
$
322