Investments - Scheduled Contractual Maturities of Fixed-Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Available-for-sale
Due in one year or less, Amortized Cost	$ 1,518	$ 2,366
Due after one year through five years, Amortized Cost	35,153	24,829
Due after five years through ten years, Amortized Cost	39,811	59,083
Due after ten years, Amortized Cost	11,098	13,531
Commercial mortgage-backed securities, Amortized Cost	11,163	10,929
Amortized Cost Total	98,743	110,738
Due in one year or less, Fair Value	1,520	2,381
Due after one year through five years, Fair Value	35,313	25,145
Due after five years through ten years, Fair Value	40,365	59,582
Due after ten years, Fair Value	11,448	13,711
Commercial mortgage-backed securities, Fair Value	11,531	11,332
Fair Value Total	$ 100,177	$ 112,151