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Employee Benefit Plans (Details 2) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Change in benefit obligation:    
Benefit obligation at March 31, 2012 $ 35,624  
Service Cost 0 0
Interest Cost 1,375 1,375
Plan amendments 0  
Curtailment / settlement (1,655)  
Actuarial (gains) losses 7,069  
Benefits paid (2,372)  
Benefit obligation at December 31, 2012 40,041 40,041
Change in plan assets:    
Fair value of plan assets at March 31, 2012 25,045  
Actual return on plan assets 1,091  
Employer contributions 1,005  
Benefits paid (2,372)  
Fair value of plan assets at December 31, 2012 24,769 24,769
Unfunded status $ 15,272