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Auction Rate Securities - ARS Investments (Detail) (Auction Rate Securities [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]    
Original Cost Basis $ 22,600 $ 24,000
Other-than- temporary Impairment in Retained Earnings (12,450) (12,775)
New Cost Basis 10,150 11,225
Unrealized Gain/(Loss) 8,306 8,560
Fair Value 18,456 19,785
Student Loans [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Original Cost Basis 3,500 3,500
Other-than- temporary Impairment in Retained Earnings (179) (179)
New Cost Basis 3,321 3,321
Unrealized Gain/(Loss) (143) (149)
Fair Value 3,178 3,172
Credit Linked Notes [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Original Cost Basis 13,500 13,500
Other-than- temporary Impairment in Retained Earnings (7,188) (7,513)
New Cost Basis 6,312 5,987
Unrealized Gain/(Loss) 5,628 5,891
Fair Value 11,940 11,878
Preferred Stock [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Original Cost Basis 5,000 5,000
Other-than- temporary Impairment in Retained Earnings (5,000) (5,000)
New Cost Basis     
Unrealized Gain/(Loss) 2,750 2,750
Fair Value 2,750 2,750
Municipals [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Original Cost Basis 600 2,000
Other-than- temporary Impairment in Retained Earnings (83) (83)
New Cost Basis 517 1,917
Unrealized Gain/(Loss) 71 68
Fair Value $ 588 $ 1,985