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STOCK COMPENSATION PLANS (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | May 25, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorizes under the plan (in shares) |  |  |  | 500,000
Number of directors consists in committee | 3 |  |  |
Weighted Average Exercise [Abstract] |  |  |  |
Fair value of options granted (in dollars per shares) | $ 2.92 | $ 3.50 | $ 3.73 |
Total intrinsic value of options exercised | $ 449,000 | $ 167,000 | $ 700,000 |
Received cash from the exercise of options | 852,000 |  |  |
Tax Benefit from Stock Options Exercised in Prior Years | 291,000 |  |  |
Tax benefit realized during the period | 177,000 |  |  |
Options Exercisable [Abstract] |  |  |  |
Unrecognized expense related to non-vested option shares | 35,000 |  |  |
Period over which unvested options cost will recognized | 4 months 24 days |  |  |
1992 Non-Qualified Stock Option Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorizes under the plan (in shares) | 375,000 |  |  |
Employees [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of fair market value stock options are priced (in hundredths) | 85.00% |  |  |
Directors and Officers [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of fair market value stock options are priced (in hundredths) | 90.00% |  |  |
Employee and director [Member] | $13.30 - $18.44 [Member] |  |  |  |
Options Outstanding [Abstract] |  |  |  |
Range of Exercise Price, Minimum (in dollars per shares) | $ 13.30 |  |  |
Range of Exercise Price, Maximum (in dollars per shares) | $ 18.44 |  |  |
Shares Outstanding (in shares) | 153,750 |  |  |
Weighted Average Remaining Life | 3 years 2 months 26 days |  |  |
Weighted Average Exercise Price (in dollars per shares) | $ 16.17 |  |  |
Aggregate Intrinsic Value | 963,000 |  |  |
Options Exercisable [Abstract] |  |  |  |
Range of Exercise Price, Minimum (in dollars per shares) | $ 13.30 |  |  |
Range of Exercise Price, Maximum (in dollars per shares) | $ 18.44 |  |  |
Shares Exercisable (in shares) | 153,750 |  |  |
Weighted Average Remaining Life | 3 years 2 months 26 days |  |  |
Weighted Average Exercise Price (in dollars per shares) | $ 16.17 |  |  |
Aggregate Intrinsic Value | 963,000 |  |  |
Employee and director [Member] | $18.45 - $21.12 [Member] |  |  |  |
Options Outstanding [Abstract] |  |  |  |
Range of Exercise Price, Minimum (in dollars per shares) | $ 18.45 |  |  |
Range of Exercise Price, Maximum (in dollars per shares) | $ 21.12 |  |  |
Shares Outstanding (in shares) | 267,750 |  |  |
Weighted Average Remaining Life | 5 years 2 months 8 days |  |  |
Weighted Average Exercise Price (in dollars per shares) | $ 19.52 |  |  |
Aggregate Intrinsic Value | 778,000 |  |  |
Options Exercisable [Abstract] |  |  |  |
Range of Exercise Price, Minimum (in dollars per shares) | $ 18.45 |  |  |
Range of Exercise Price, Maximum (in dollars per shares) | $ 21.12 |  |  |
Shares Exercisable (in shares) | 234,000 |  |  |
Weighted Average Remaining Life | 4 years 11 months 16 days |  |  |
Weighted Average Exercise Price (in dollars per shares) | $ 19.6 |  |  |
Aggregate Intrinsic Value | $ 663,000 |  |  |
Class A Stock [Member] | Key Employees and Officers [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorizes under the plan (in shares) | 150,000 |  |  |
Class A Stock [Member] | Stock Options [Member] |  |  |  |
Shares [Abstract] |  |  |  |
Outstanding at beginning of year (in shares) | 450,000 | 440,800 | 497,889 |
Granted (in shares) | 33,750 | 33,750 | 33,750 |
Exercised (in shares) | (62,250) | (24,550) | (90,839) |
Expired (in shares) | 0 | 0 | 0 |
Outstanding at end of year (in shares) | 421,500 | 450,000 | 440,800 |
Options exercisable at year end (in shares) | 387,750 | 416,250 | 407,050 |
Weighted Average Exercise [Abstract] |  |  |  |
Outstanding at beginning of year (in dollars per shares) | $ 17.61 | $ 17.18 | $ 15.91 |
Granted (in dollars per shares) | $ 19.01 | $ 19.06 | $ 18.61 |
Exercised (in dollars per shares) | $ 13.68 | $ 11.87 | $ 10.75 |
Expired (in dollars per shares) | $ 0 | $ 0 | $ 0 |
Outstanding at end of year (in dollars per shares) | $ 18.30 | $ 17.61 | $ 17.18 |
Options exercisable at year end (in dollars per shares) | $ 18.24 | $ 17.49 | $ 17.06 |

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -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 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -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 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a, b) -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. + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -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 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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