Investments - Summary of Company's Investment Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investment Securities [Line Items]
Amortized Cost	$ 116,972	$ 122,841
Gross Unrealized Gains	4,830	8,222
Gross Unrealized Losses	(2,291)	(350)
Fair Value	119,511	130,713
Mutual Fund Amortized Cost	9,901	7,501
Mutual Fund Gross Unrealized Gains	836	832
Mutual Fund Gross Unrealized Losses
Mutual Fund Fair value	10,737	8,333
Total Amortized Cost	126,873	130,342
Total Gross Unrealized Gains	5,666	9,054
Total Gross Unrealized Losses	(2,291)	(350)
Total Fair Value	130,248	139,046
U.S. Government and Agencies [Member]
Investment Securities [Line Items]
Amortized Cost	12,006	11,202
Gross Unrealized Gains	495	908
Gross Unrealized Losses	(16)
Fair Value	12,485	12,110
State [Member]
Investment Securities [Line Items]
Amortized Cost	697	3,994
Gross Unrealized Gains	39	117
Gross Unrealized Losses
Fair Value	736	4,111
Political Subdivisions [Member]
Investment Securities [Line Items]
Amortized Cost	601	753
Gross Unrealized Gains	11	37
Gross Unrealized Losses
Fair Value	612	790
Revenue and Assessment [Member]
Investment Securities [Line Items]
Amortized Cost	14,050	16,449
Gross Unrealized Gains	619	1,553
Gross Unrealized Losses	(11)	(6)
Fair Value	14,658	17,996
Corporate Bonds [Member]
Investment Securities [Line Items]
Amortized Cost	73,461	68,114
Gross Unrealized Gains	2,127	3,669
Gross Unrealized Losses	(2,263)	(246)
Fair Value	73,325	71,537
Agency Backed [Member]
Investment Securities [Line Items]
Amortized Cost	7,113	11,079
Gross Unrealized Gains	401	791
Gross Unrealized Losses
Fair Value	7,514	11,870
Non-Agency Backed - Residential [Member]
Investment Securities [Line Items]
Amortized Cost	4,181	5,098
Gross Unrealized Gains	480	472
Gross Unrealized Losses	(1)	(98)
Fair Value	4,660	5,472
Non-Agency Backed - Commercial [Member]
Investment Securities [Line Items]
Amortized Cost	3,363	4,652
Gross Unrealized Gains	580	457
Gross Unrealized Losses
Fair Value	3,943	5,109
Redeemable Preferred Stock [Member]
Investment Securities [Line Items]
Amortized Cost	1,500	1,500
Gross Unrealized Gains	78	218
Gross Unrealized Losses
Fair Value	$ 1,578	$ 1,718