Tax Effects of Temporary Differences That Give Rise to Federal, Foreign, State and Local Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets:
Loss Reserve Discount	$ 26,468	$ 20,425
Unearned Premiums	29,500	24,352
Compensation Related	9,433	8,462
State and Local	3,551	616
Net Currency Translation Adjustments	299	2,084
Net Unrealized Losses on Securities	11,553
Other	3,598	152
Total Gross Deferred Tax Assets	97,025	65,491
Less: Valuation Allowance	(4,367)	(1,798)
Total Deferred Tax Assets	92,658	63,693
Deferred Tax Liabilities:
Loss Reserve Discount - Transition Rule	(7,570)	(5,066)
Net Unrealized Gains on Securities		(8,708)
Deferred Acquisition Costs	(25,109)	(20,670)
Claims Equalization Reserve	(7,913)
Net Unrealized Foreign Exchange	(3,769)	(3,782)
Intangibles	(3,438)
Other	(2,562)	(3,196)
Total Deferred Tax Liabilities	50,361	41,422
Net Deferred Income Tax Asset	42,297	22,271
Lloyd's
Deferred Tax Assets:
Lloyd's Year of Account Deferral	$ 12,623	$ 9,400