Allowance for Credit Losses (Allowance for Credit Losses and Recorded Investment in Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Allowances for credit losses:
Ending balance
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment
Ending balance: loans acquired with deteriorated credit quality
Financing receivables:
Ending balance	65	197
Ending balance: individually evaluated for impairment	65	197
Ending balance: collectively evaluated for impairment
Ending balance: loans acquired with deteriorated credit quality
Finance Leases [Member]
Allowances for credit losses:
Ending balance
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment
Ending balance: loans acquired with deteriorated credit quality
Financing receivables:
Ending balance	65	197
Ending balance: individually evaluated for impairment	65	197
Ending balance: collectively evaluated for impairment
Ending balance: loans acquired with deteriorated credit quality