Fair Value Measurements - Company's Assets and Liabilities that are Measured at Fair Value on a Recurring Basis by Levels (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Assets	$ 8,028	$ 5,009
Liabilities
Liabilities	56	41
Interest Rate Swap [Member]
Liabilities
Liabilities	56	41
Fixed Maturities [Member] | Certificates of deposit, short term [Member]
Assets
Assets	1,057	914
Fixed Maturities [Member] | Investment grade corporate bonds [Member]
Assets
Assets	6,011	3,108
Short-term investments [Member] | Certificates of deposit, short term [Member]
Assets
Assets	201	301
Short-term investments [Member] | Money market funds [Member]
Assets
Assets	60	93
Deferred compensation investments [Member] | Equity mutual fund investments [Member]
Assets
Assets	419	313
State guarantee fund deposits [Member] | Certificates of deposit, short term [Member]
Assets
Assets	50	50
State guarantee fund deposits [Member] | Government Securities [Member]
Assets
Assets	230	230
Level 1 [Member]
Assets
Assets	709	636
Level 1 [Member] | Short-term investments [Member] | Money market funds [Member]
Assets
Assets	60	93
Level 1 [Member] | Deferred compensation investments [Member] | Equity mutual fund investments [Member]
Assets
Assets	419	313
Level 1 [Member] | State guarantee fund deposits [Member] | Government Securities [Member]
Assets
Assets	230	230
Level 2 [Member]
Assets
Assets	7,319	4,373
Liabilities
Liabilities	56	41
Level 2 [Member] | Interest Rate Swap [Member]
Liabilities
Liabilities	56	41
Level 2 [Member] | Fixed Maturities [Member] | Certificates of deposit, short term [Member]
Assets
Assets	1,057	914
Level 2 [Member] | Fixed Maturities [Member] | Investment grade corporate bonds [Member]
Assets
Assets	6,011	3,108
Level 2 [Member] | Short-term investments [Member] | Certificates of deposit, short term [Member]
Assets
Assets	201	301
Level 2 [Member] | State guarantee fund deposits [Member] | Certificates of deposit, short term [Member]
Assets
Assets	$ 50	$ 50