| 
           CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (USD $) 
        In Thousands  | 
        
           Common Stock [Member] 
         | 
        
           Additional Paid-in Capital [Member] 
         | 
        
           Retained Earnings [Member] 
         | 
        
           Accumulated Other Comprehensive Income (Loss) [Member] 
         | 
        
           Treasury Stock [Member] 
         | 
        
           Non-controlling Interest [Member] 
         | 
        
           Total 
         | 
      
|---|---|---|---|---|---|---|---|
| Balance at Sep. 30, 2012 | $ 36,334 | $ 47,893 | $ 727,176 | $ (65,083) | $ (268,499) | $ 2,613 | $ 480,434 | 
| Net income | 0 | 0 | 8,255 | 0 | 0 | (252) | 8,003 | 
| Pension adjustments | 0 | 0 | 0 | 1,073 | 0 | 0 | 1,073 | 
| Translation adjustment | 0 | 0 | 0 | 7,609 | 0 | (301) | 7,308 | 
| Fair value of derivatives | 0 | 0 | 0 | 623 | 0 | 0 | 623 | 
| Total comprehensive income | 17,007 | ||||||
| Stock-based compensation | 0 | 1,379 | 0 | 0 | 0 | 0 | 1,379 | 
| Purchase of treasury stock | 0 | 0 | 0 | 0 | (4,530) | 0 | (4,530) | 
| Issuance of treasury stock | 0 | (5,438) | 0 | 0 | 5,921 | 0 | 483 | 
| Dividends | 0 | 0 | (2,841) | 0 | 0 | 0 | (2,841) | 
| Balance at Dec. 31, 2012 | 36,334 | 43,834 | 732,590 | (55,778) | (267,108) | 2,060 | 491,932 | 
| Balance at Sep. 30, 2013 | 36,334 | 47,315 | 775,762 | (26,940) | (283,006) | 3,465 | 552,930 | 
| Net income | 0 | 0 | 7,914 | 0 | 0 | (8) | 7,906 | 
| Pension adjustments | 0 | 0 | 0 | 528 | 0 | 0 | 528 | 
| Translation adjustment | 0 | 0 | 0 | 2,546 | 0 | 143 | 2,689 | 
| Fair value of derivatives | 0 | 0 | 0 | 1,233 | 0 | 0 | 1,233 | 
| Total comprehensive income | 12,356 | ||||||
| Stock-based compensation | 0 | 1,574 | 0 | 0 | 0 | 0 | 1,574 | 
| Purchase of treasury stock | 0 | 0 | 0 | 0 | (4,195) | 0 | (4,195) | 
| Issuance of treasury stock | 0 | (3,200) | 0 | 0 | 5,011 | 0 | 1,811 | 
| Dividends | 0 | 0 | (3,026) | 0 | 0 | 0 | (3,026) | 
| Balance at Dec. 31, 2013 | $ 36,334 | $ 45,689 | $ 780,650 | $ (22,633) | $ (282,190) | $ 3,600 | $ 561,450 |