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FAIR VALUE MEASUREMENTS: (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2008
Level 3 reconciliation |  |  |  |
Industrial revenue development bonds, carrying amount, approximates fair value | $ 7,500 | $ 7,500 | $ 7,500 |
Cost Basis | Level 2 |  |  |  |
Level 3 reconciliation |  |  |  |
Industrial revenue development bonds, carrying amount, approximates fair value | 7,500 | 7,500 | 7,500 |
Estimated Fair Value | Level 2 |  |  |  |
Level 3 reconciliation |  |  |  |
Industrial revenue development bonds, carrying amount, approximates fair value | 7,500 | 7,500 | 7,500 |
Jefferson County Alabama Sewer Revenue Refunding Warrants | Auction rate security |  |  |  |
Fair value on a recurring basis |  |  |  |
Sale value of investment | 10,840 |  |  |
Jefferson County Alabama Sewer Revenue Refunding Warrants | Auction rate security | Level 3 |  |  |  |
Fair value on a recurring basis |  |  |  |
Other-than-temporary pre-tax impairment on investment |  |  |  | 5,140
Carrying value of investment |  |  | 9,485 |
Net gain of investment | 2,430 |  |  |
Level 3 reconciliation |  |  |  |
Balance at the beginning of the period |  | 9,485 | 7,453 |
Unrealized gain in other comprehensive earnings |  | 1,355 | 2,032 |
Settlement of security |  | (10,840) |  |
Balance at the end of the period |  |  | 9,485 |
Jefferson County Alabama Sewer Revenue Refunding Warrants | AAA rating | Auction rate security | Level 3 |  |  |  |
Fair value on a recurring basis |  |  |  |
Purchase cost of investment |  |  |  | 13,550
Carrying value of investment |  |  |  | 8,410
Level 3 reconciliation |  |  |  |
Balance at the end of the period |  |  |  | $ 8,410

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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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