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Summary of Insurance Enhanced Municipal Bonds Backed by Financial Guarantors (Detail) $ in Thousands | Sep. 30, 2015 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | $ 19,005
Ambac Financial Group |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 1,686
Assured Guaranty Corporation |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 3,661
Municipal Bond Insurance Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 4,920
Gov't National Housing Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 553
Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 10,820
Other Credit Enhanced Municipal Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 8,185
Pre-Refunded Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 8,321
Pre-Refunded Securities | Ambac Financial Group |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 136
Pre-Refunded Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 136
Pre-Refunded Securities | Other Credit Enhanced Municipal Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 8,185
Government Guaranteed Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 553
Government Guaranteed Securities | Gov't National Housing Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 553
Government Guaranteed Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 553
Exposure Net Of Pre-refunded & Government Guaranteed Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 10,131
Exposure Net Of Pre-refunded & Government Guaranteed Securities | Ambac Financial Group |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 1,550
Exposure Net Of Pre-refunded & Government Guaranteed Securities | Assured Guaranty Corporation |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 3,661
Exposure Net Of Pre-refunded & Government Guaranteed Securities | Municipal Bond Insurance Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 4,920
Exposure Net Of Pre-refunded & Government Guaranteed Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | $ 10,131

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