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Stockholders' Equity (Details) (USD $) | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Preferred Stock [Member] | Dec. 31, 2012 Series A Preferred Stock [Member] | Aug. 31, 2011 Stock Repurchase Program 2011 [Member] | Dec. 31, 2012 Stock Repurchase Program 2011 [Member] | Dec. 31, 2011 Stock Repurchase Program 2011 [Member] | May 31, 2012 Stock Repurchase Program 2012 [Member] | Dec. 31, 2012 Stock Repurchase Program 2012 [Member]
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 500,000 | 30,000 |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ 20 |  |  |  |  |  |  |  |
Preferred stock, voting rights |  |  |  | Each share of the Series A Preferred Stock shall entitle the holder to one thousand votes |  |  |  |  |
Preferred stock, shares outstanding (in shares) | 0 | 0 |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 5,000,000 |  |  | $ 5,000,000 |
Stock repurchased during period (in shares) |  |  |  |  |  | 68,250 | 322,250 |  | 312,527
Stock repurchased during period | 4,999,000 | 4,136,000 |  |  |  | 900,000 | 4,100,000 |  | 4,100,000
Stock repurchase program, remaining authorized amount |  |  |  |  |  | 0 |  |  | 900,000
Accumulated other comprehensive income [Abstract] |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 4,663,000 | 3,078,000 |  |  |  |  |  |  |
Unrecognized postretirement benefit costs (credit) | (784,000) | 221,000 |  |  |  |  |  |  |
Total accumulated other comprehensive income | $ 3,879,000 | $ 3,299,000 |  |  |  |  |  |  |

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