Segment Information - Selected Financial Data by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 88,536	$ 87,620	$ 80,631	$ 75,105	$ 67,928	$ 65,604	$ 67,120	$ 62,542	$ 331,892	$ 263,194	$ 240,512
Income (loss) before income taxes	458	$ (4,524)	$ 690	$ 804	3,076	$ 2,377	$ 3,723	$ 547	(2,572)	9,723	9,830
Total assets	402,127				328,445				402,127	328,445
Insurance
Segment Reporting Information [Line Items]
Revenues									331,828	263,133	240,460
Income (loss) before income taxes									338	12,549	12,748
Total assets	373,475				302,529				373,475	302,529
Real estate and Corporate
Segment Reporting Information [Line Items]
Revenues									64	61	52
Income (loss) before income taxes									(2,910)	(2,826)	$ (2,918)
Total assets	$ 28,652				$ 25,916				$ 28,652	$ 25,916