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Derivative Instruments and Hedging Activities (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Jun. 30, 2009 | Dec. 31, 2012
Interest Rate Caps Purchased |  |  | $ 7,100,000 |
Derivative Cap Fixed Interest Rate |  |  | 2.97% |
Deposits, Money Market Deposits |  |  | 70,000,000 |
Derivative Asset, Fair Value, Net | 14,000 |  |  | 14,000
Interest Expense Hedged Deposits | 416,000 | 460,000 |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 416,000 | 359,000 |  |
Hedged Deposits | 28,000,000 |  |  | 90,000,000
Interest Bearing Liabilities, Percentage | 1.02% | 1.20% |  |
Future Interest Expenses on Hedge Deposits | 1,400,000 |  |  |
Future Interest Expenses on Hedge Terminated | 1,100,000 |  |  |
Accounts Payable, Interest-Bearing | $ 428,000 |  |  | $ 428,000

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable to vendors that bear interest at either a stated or an imputed rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 + Details
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