Schedule III - Supplementary Insurance Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplementary Insurance Information, by Segment [Line Items]
Deferred policy acquisition cost	$ 2,190	$ 1,184	$ 1,408
Claims payable	2,220	2,136	2,801
Unearned premium	35,395	19,792	22,457
Other policy claims and benefits payable	3,088	2,105	2,212
Premium revenues	86,363	80,153	76,227
Investment income	164	128	111
Future policy benefits, losses, claims and expense losses	67,762	63,736	62,351
Amortization of deferred policy acquisition cost	3,862	3,592	3,921
Other operating expense	12,928	11,018	9,196
Fully-insured dental HMO/Indemnity [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premium revenues	46,656	43,844	42,527
Future policy benefits, losses, claims and expense losses	35,024	33,399	33,463
Premium written	75,363	52,650	45,242
Fully-insured dental PPO [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premium revenues	13,494	11,429	9,557
Future policy benefits, losses, claims and expense losses	10,695	9,363	8,543
Self-insured dental [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premium revenues	25,641	24,380	23,650
Future policy benefits, losses, claims and expense losses	22,043	20,974	20,345
Corporate, all other [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premium revenues	$ 572	$ 500	$ 493