Schedule II (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance	$ 727	$ 908	$ 1,438
Valuation Allowances and Reserves, Charged to Cost and Expense	741	63	300
Valuation Allowances and Reserves, Period Increase (Decrease)	(57)	(118)	(524)
Valuation Allowances and Reserves, Deductions	(82)	(126)	(306)
Valuation Allowances and Reserves, Balance	1,329	727	908
Allowance for Trade Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance	443	497	868
Valuation Allowances and Reserves, Charged to Cost and Expense	316	63	297
Valuation Allowances and Reserves, Period Increase (Decrease)	(57)	(96)	(484)
Valuation Allowances and Reserves, Recoveries	20
Valuation Allowances and Reserves, Deductions		(21)	(184)
Valuation Allowances and Reserves, Balance	722	443	497
Allowance for Loan and Lease Losses [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance	284	411	570
Valuation Allowances and Reserves, Charged to Cost and Expense	425	0	3
Valuation Allowances and Reserves, Period Increase (Decrease)	0	(22)	(40)
Valuation Allowances and Reserves, Deductions	(102)	(105)	(122)
Valuation Allowances and Reserves, Balance	$ 607	$ 284	$ 411

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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- Definition

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- Definition

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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Total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.

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