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RETIREMENT PLANS: (Details 4) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Pension Plan [Member] |  |
Defined Benefit Plan Percentage Of Plan Assets | 100.00% | 100.00%
Employee Stock Ownership Plan [Member] |  |
Defined Benefit Plan Percentage Of Plan Assets | 100.00% | 100.00%
Equity Securities [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 88.00% |
Equity Securities [Member] | Pension Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 61.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 63.00% |
Defined Benefit Plan Percentage Of Plan Assets | 55.00% | 49.00%
Equity Securities [Member] | Employee Stock Ownership Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 99.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 100.00% |
Defined Benefit Plan Percentage Of Plan Assets | 98.00% | 99.00%
Convertible Debt Securities [Member] | Pension Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 33.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 36.00% |
Defined Benefit Plan Percentage Of Plan Assets | 33.00% | 36.00%
Convertible Debt Securities [Member] | Employee Stock Ownership Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 0.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 0.00% |
Defined Benefit Plan Percentage Of Plan Assets | 0.00% | 0.00%
Other Securities [Member] | Pension Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 1.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 6.00% |
Defined Benefit Plan Percentage Of Plan Assets | 12.00% | 15.00%
Other Securities [Member] | Employee Stock Ownership Plan [Member] |  |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | 0.00% |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | 1.00% |
Defined Benefit Plan Percentage Of Plan Assets | 2.00% | 1.00%

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- Definition The percentage of plan assets during the period. + References No definition available. + Details
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- Definition Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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