Insurance Operations - Beginning and Ending Balances and Changes in DPAC (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of period	$ 91,882	$ 84,686
Capitalized Costs	48,508	41,520
Amortization of DPAC	(46,036)	(42,922)
DPAC, end of period	$ 94,354	$ 83,284