Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Accrued expenses	$ 18,747	$ 18,290
Federal offset to Canadian deferred tax liability	8,299	7,961
Net operating loss (NOL) carryforwards	5,036	7,017
Tax credit carryforwards	4,596	2,230
Deferred payroll taxes	3,297	0
Net unrealized losses on investments in securities	2,719	621
Investments	1,529	424
Other intangibles	1,321	0
Title loss provisions	1,138	837
Allowance for uncollectible amounts	1,056	983
Foreign currency translation adjustments	959	1,765
Other	1,174	533
Deferred tax assets – gross	49,871	40,661
Valuation allowance	(6,471)	(4,056)
Deferred tax assets – net	43,400	36,605
Deferred tax liabilities:
Amortization – goodwill and other intangibles	(26,669)	(22,379)
Title loss provisions	(18,724)	(29,704)
Net unrealized gains on investments in securities	(7,684)	(4,218)
Deferred compensation on life insurance policies	(2,296)	(2,202)
Fixed assets	(6,046)	(1,997)
Investments	(1,193)	0
Other	(310)	(417)
Deferred tax liabilities – gross	(62,922)	(60,917)
Net deferred income tax liability	$ (19,522)	$ (24,312)