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Summary of Insurance Enhanced Municipal Bonds Backed by Financial Guarantors (Detail) $ in Thousands | Jun. 30, 2015 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | $ 17,454
Ambac Financial Group |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 1,688
Assured Guaranty Corporation |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 3,692
Municipal Bond Insurance Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 5,159
Gov't National Housing Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 552
Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 11,091
Other Credit Enhanced Municipal Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 6,363
Pre-Refunded Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 6,501
Pre-Refunded Securities | Ambac Financial Group |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 138
Pre-Refunded Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 138
Pre-Refunded Securities | Other Credit Enhanced Municipal Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 6,363
Government Guaranteed Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 552
Government Guaranteed Securities | Gov't National Housing Association |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 552
Government Guaranteed Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 552
Exposure Net Of Pre-refunded & Government Guaranteed Securities |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | 10,401
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 | 3,692
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 | 5,159
Exposure Net Of Pre-refunded & Government Guaranteed Securities | Financial Guarantors |
Schedule of Available-for-sale Securities [Line Items] |
Investments in insurance enhanced municipal bonds | $ 10,401

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