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LONG-TERM DEBT (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Borrowings [Abstract] |  |
Long-term debt | $ 247,331,000 | $ 238,396,000
Less: Current portion | (22,057,000) | (22,057,000)
Total long-term debt | 225,274,000 | 216,339,000
Line of Credit [Member] | LIBOR [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 1.50% |
Line of Credit [Member] | Prime rate [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 0.50% |
Term Loan [Member] |  |
Borrowings [Abstract] |  |
Commitment fee (in hundredths) | 0.25% |
Incremental higher interest rate after acquisition (in hundredths) | 0.25% |
Unsecured Subordinated Notes Payable [Member] |  |
Borrowings [Abstract] |  |
Long-term debt | 3,154,000 | 3,870,000
Revolving Credit Facility [Member] |  |
Borrowings [Abstract] |  |
Increase in borrowing capacity |  | 75,000,000
Incremental higher interest rate after acquisition (in hundredths) | 0.70% |
Available for borrowing under the facility | 105,700,000 |
Expiration date | Jul. 11, 2017 |
Revolving Credit Facility [Member] | Minimum [Member] |  |
Borrowings [Abstract] |  |
Commitment fee (in hundredths) | 0.20% |
Revolving Credit Facility [Member] | Maximum [Member] |  |
Borrowings [Abstract] |  |
Commitment fee (in hundredths) | 0.40% |
Revolving Credit Facility [Member] | LIBOR [Member] |  |
Borrowings [Abstract] |  |
Base rate | LIBOR |
Basis spread on base rate (in hundredths) | 1.75% |
Amount outstanding | 241,100,000 |
Weighted average interest rate (in hundredths) | 1.80% |
Revolving Credit Facility [Member] | LIBOR [Member] | Minimum [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 1.25% |
Revolving Credit Facility [Member] | LIBOR [Member] | Maximum [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 2.25% |
Revolving Credit Facility [Member] | Prime rate [Member] |  |
Borrowings [Abstract] |  |
Base rate | prime |
Amount outstanding | 3,100,000 |
Weighted average interest rate (in hundredths) | 3.50% |
Revolving Credit Facility [Member] | Prime rate [Member] | Minimum [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 0.25% |
Revolving Credit Facility [Member] | Prime rate [Member] | Maximum [Member] |  |
Borrowings [Abstract] |  |
Basis spread on base rate (in hundredths) | 1.25% |
Wells Fargo Bank, National Association [Member] | Line of Credit [Member] |  |
Borrowings [Abstract] |  |
Long-term debt | 124,489,000 | 104,526,000
Maximum borrowing capacity | 262,500,000 |
Wells Fargo Bank, National Association [Member] | Term Loan [Member] |  |
Borrowings [Abstract] |  |
Long-term debt | $ 119,688,000 | $ 130,000,000

X
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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