Annual report pursuant to Section 13 and 15(d)

Amortized Cost and Market Value of Available-For-Sale Securities by Major Security Type (Detail)

v2.4.0.6
Amortized Cost and Market Value of Available-For-Sale Securities by Major Security Type (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 229,967 $ 194,171
Market 296,277 195,188
State and municipal debt securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 161,761 166,005
Market 162,740 166,846
Corporate debt securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 22,693 16,100
Market 22,802 16,246
Foreign corporate debt securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 16,041 7,474
Market 16,071 7,489
U.S. government securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 0 1,502
Market 0 1,517
Foreign government securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 0 3,090
Market 0 3,090
Equity Securities
   
Schedule of Available-for-sale Securities [Line Items]    
Cost 29,472 0
Market $ 94,664 $ 0