Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Amortized Cost and Market Value of Available-For-Sale Securities by Major Security Type (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 241,032 $ 229,967
Market 301,527 296,277
State and municipal debt securities
    
Schedule of Available-for-sale Securities [Line Items]    
Cost 179,463 161,761
Market 179,764 162,740
Corporate debt securities
    
Schedule of Available-for-sale Securities [Line Items]    
Cost 12,804 22,693
Market 12,817 22,802
Foreign corporate debt securities
    
Schedule of Available-for-sale Securities [Line Items]    
Cost 4,484 6,080
Market 4,490 6,110
Certificates of deposit
    
Schedule of Available-for-sale Securities [Line Items]    
Cost 14,809 9,961
Market 14,809 9,961
Equity Securities
    
Schedule of Available-for-sale Securities [Line Items]    
Cost 29,472 29,472
Market $ 89,647 $ 94,664