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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)
In Thousands, unless otherwise specified
Common Stock [Member]
Capital In Excess of Par Value [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2011 $ 47,872 $ 79,789 $ 153,555 $ 3,299 $ (12,562) $ 271,953
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net earnings 0 0 18,598 0 0 18,598
Other comprehensive income 0 0 0 (94) 0 (94)
Cash dividends paid 0 0 (4,121) 0 0 (4,121)
Purchase of treasury stock 0 0 0 0 (4,999) (4,999)
Stock-based compensation and related tax benefits 0 872 0 0 410 1,282
Stock options and related tax benefits 0 29 0 0 278 307
Employee Stock Ownership Plan 0 1,839 0 0 2,026 3,865
Balance at Jun. 30, 2012 $ 47,872 $ 82,529 $ 168,032 $ 3,205 $ (14,847) $ 286,791