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Inventories (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Inventories carried at LIFO: |  |
Finished goods | $ 45,589 tnc_InventoryFinishedGoodsLifo | $ 41,687 tnc_InventoryFinishedGoodsLifo
Raw materials, production parts and work-in-process | 26,113 tnc_InventoryRawMaterialsProductionPartsAndWorkInProcessLifo | 24,458 tnc_InventoryRawMaterialsProductionPartsAndWorkInProcessLifo
LIFO Reserve | (28,166)us-gaap_InventoryLIFOReserve | (28,166)us-gaap_InventoryLIFOReserve
LIFO Inventory Amount | 43,536 us-gaap_LIFOInventoryAmount | 37,979 us-gaap_LIFOInventoryAmount
Inventories carried at FIFO: |  |
Finished goods | 29,685 tnc_InventoryFinishedGoodsFifo | 29,851 tnc_InventoryFinishedGoodsFifo
Raw materials, production parts and work-in-process | 12,390 tnc_InventoryRawMaterialsProductionPartsAndWorkInProcessFifo | 12,681 tnc_InventoryRawMaterialsProductionPartsAndWorkInProcessFifo
Total FIFO inventories | 42,075 us-gaap_FIFOInventoryAmount | 42,532 us-gaap_FIFOInventoryAmount
Total Inventories | $ 85,611 us-gaap_InventoryNet | $ 80,511 us-gaap_InventoryNet

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- Definition Carrying amount as of the balance sheet date of merchandise or goods (FIFO) held by the company that are readily available for sale. + References No definition available. + Details
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- Definition The aggregate carrying amount (FIFO) as of the balance sheet date of items held by the entity which are partially completed at the time of measurement and unprocessed items that will go through the production process and become part of the final product. + References No definition available. + Details
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- Definition The aggregate gross carrying amount (LIFO) as of the balance sheet date of items held by the entity which are partially completed at the time of measurement and unprocessed items that will go through the production process and become part of the final product. + References No definition available. + Details
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- Definition The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost. + 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 210.5-02.6(c)) -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 6 -Subparagraph c -Article 5 + Details
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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