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DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) | Mar. 31, 2013 Transaction | Dec. 31, 2012
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Number of Forward Starting Interest Rate Swap Transactions | 2 |
Accumulated other comprehensive income - unrealized loss on valuation of swap agreements | $ 4,900,000 | $ 4,300,000
Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments | 5,000,000 | 4,400,000
Fair Value, Measurements, Recurring | Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments | 5,044,000 |
Cash Flow Hedging | Variable-Rate Derivatives, Maturing in October 2012 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Cap Interest Rate | 3.00% |
Cash Flow Hedging | Variable Rate Derivatives Maturing in July 2015 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Cap Interest Rate | 4.30% |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022 |  |
Derivatives, Fair Value [Line Items] |  |
Number of interest rate swaps (in interest rate swaps) | 8 |
Notional Amount of Interest Rate Cash Flow Hedge Derivatives | 148,600,000 |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022 | Minimum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fixed Interest Rate | 0.52% |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022 | Maximum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fixed Interest Rate | 3.77% |
Interest Rate Swap | Cash Flow Hedging | Variable-Rate Derivatives |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount of Interest Rate Cash Flow Hedge Derivatives | 182,900,000 |
Derivative, Number of Instruments Held | 6 |
Forward Contracts | Cash Flow Hedging | Variable-Rate Derivatives |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount of Interest Rate Cash Flow Hedge Derivatives | $ 25,000,000 |

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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80784-113994 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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- Definition Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
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- Definition Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 + Details
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