Fair Value - Presentation of Fair-Value Measurements for Each Major Category of Assets Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	$ 133,213	$ 130,248
Limited partnership interests	7,867	7,513
Fair Value Measurements Using [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	133,213	130,248
Limited partnership interests	7,867	7,513
Cash and cash equivalents	77,132	72,033
Total	218,212	209,794
Fair Value Measurements Using [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	122,298	119,511
Fair Value Measurements Using [Member] | Debt Securities [Member] | U.S. Government and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	12,425	12,485
Fair Value Measurements Using [Member] | Debt Securities [Member] | State [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	734	736
Fair Value Measurements Using [Member] | Debt Securities [Member] | Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	612	612
Fair Value Measurements Using [Member] | Debt Securities [Member] | Revenue and Assessment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	14,650	14,658
Fair Value Measurements Using [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	76,796	73,325
Fair Value Measurements Using [Member] | Debt Securities [Member] | Agency Backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	7,335	7,514
Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	4,572	4,660
Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	3,470	3,943
Fair Value Measurements Using [Member] | Debt Securities [Member] | Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	1,704	1,578
Fair Value Measurements Using [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual fund, available-for-sale	10,915	10,737
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	25,044	24,800
Limited partnership interests
Cash and cash equivalents	77,132	72,033
Total	102,176	96,833
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	14,129	14,063
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | U.S. Government and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	12,425	12,485
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | State [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Revenue and Assessment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Agency Backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	1,704	1,578
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurements Using [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual fund, available-for-sale	10,915	10,737
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	108,169	105,448
Limited partnership interests
Cash and cash equivalents
Total	108,169	105,448
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	108,169	105,448
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | U.S. Government and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | State [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	734	736
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	612	612
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Revenue and Assessment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	14,650	14,658
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	76,796	73,325
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Agency Backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	7,335	7,514
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	4,572	4,660
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale	3,470	3,943
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurements Using [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual fund, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Limited partnership interests	7,867	7,513
Cash and cash equivalents
Total	7,867	7,513
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | U.S. Government and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | State [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Revenue and Assessment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Agency Backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Non-Agency Backed - Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Debt Securities [Member] | Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fixed maturities, available-for-sale
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurements Using [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual fund, available-for-sale