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Advances to and Investments in Foreign Joint Ventures' Operations - Schedule of Activity in Investment in Foreign Joint Ventures (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Investment in joint ventures: |  |
Balance, beginning of year | $ 2,281,000 | $ 2,331,000
Additional amounts invested and advanced | (180,000) | (50,000)
Balance, end of year | 2,101,000 | 2,281,000
Undistributed earnings: |  |
Balance, beginning of year | 7,816,000 | 5,736,000
Equity in earnings (loss) | 3,024,000 | 3,088,000
Dividend distributions | (1,344,000) | (1,008,000)
Balance, end of year | 9,496,000 | 7,816,000
Foreign currency translation: |  |
Balance, beginning of year | 1,311,000 | 1,240,000
Change during the year | 125,000 | 70,000
Balance, end of year | 1,436,000 | 1,311,000
Investments, end of year | 13,033,000 | 11,408,000
BOMAY |  |
Investment in joint ventures: |  |
Balance, beginning of year | 2,033,000 | 2,033,000
Additional amounts invested and advanced |  |
Balance, end of year | 2,033,000 | 2,033,000
Undistributed earnings: |  |
Balance, beginning of year | 6,400,000 | 4,839,000
Equity in earnings (loss) | 2,066,000 | 2,569,000
Dividend distributions | (1,321,000) | (1,008,000)
Balance, end of year | 7,145,000 | 6,400,000
Foreign currency translation: |  |
Balance, beginning of year | 1,098,000 | 1,040,000
Change during the year | 333,000 | 58,000
Balance, end of year | 1,431,000 | 1,098,000
Investments, end of year | 10,609,000 | 9,531,000
MIEFE |  |
Investment in joint ventures: |  |
Balance, beginning of year | 14,000 | 14,000
Additional amounts invested and advanced |  |
Balance, end of year | 14,000 | 14,000
Undistributed earnings: |  |
Balance, beginning of year | 755,000 | 739,000
Equity in earnings (loss) | 115,000 | 16,000
Balance, end of year | 870,000 | 755,000
Foreign currency translation: |  |
Balance, beginning of year | 294,000 | 233,000
Change during the year | (40,000) | 61,000
Balance, end of year | 254,000 | 294,000
Investments, end of year | 1,138,000 | 1,063,000
AAG |  |
Investment in joint ventures: |  |
Balance, beginning of year | 234,000 | 284,000
Additional amounts invested and advanced | (180,000) | (50,000)
Balance, end of year | 54,000 | 234,000
Undistributed earnings: |  |
Balance, beginning of year | 661,000 | 158,000
Equity in earnings (loss) | 843,000 | 503,000
Dividend distributions | (23,000) |
Balance, end of year | 1,481,000 | 661,000
Foreign currency translation: |  |
Balance, beginning of year | (81,000) | (32,000)
Change during the year | (168,000) | (49,000)
Balance, end of year | (249,000) | (81,000)
Investments, end of year | $ 1,286,000 | $ 814,000

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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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