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NOTES PAYABLE TO BANKS - Interest incurred on credit facility, interest capitalized related to facilities and equipment under construction, and related weighted average interest rates (Details) (Revolving credit facility, USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Revolving credit facility |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Interest incurred | $ 324 | $ 831 | $ 677 | $ 1,754
Capitalized interest | $ 247 | $ 196 | $ 489 | $ 517
Weighted average interest rate | 3.12% | 2.12% | 3.05% | 2.09%

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- Definition This represents amount for capitalized interest related to facilities and equipment under construction. + References No definition available. + Details
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- Definition It represents percentage for weighted average interest rate. + References No definition available. + Details
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- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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