Segment Information - Selected Financial Data by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 102,754	$ 80,631	$ 199,702	$ 155,737
(Loss) income before income taxes	(30,607)	690	(38,981)	1,494
Total assets	437,533		437,533		$ 402,127
Insurance
Segment Reporting Information [Line Items]
Revenues	101,501	80,614	198,434	155,703
(Loss) income before income taxes	(30,434)	1,438	(37,455)	2,990
Total assets	395,336		395,336		373,475
Real estate and Corporate
Segment Reporting Information [Line Items]
Revenues	1,253	17	1,268	34
(Loss) income before income taxes	(173)	$ (748)	(1,526)	$ (1,496)
Total assets	$ 42,197		$ 42,197		$ 28,652