Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss (NOL) carryforwards	$ 24,992	$ 22,615
Accrued expenses	22,837	20,922
Federal offset to Canadian deferred tax liability	10,339	7,591
Capitalized research and development costs	5,959	0
Tax credit carryforwards	4,173	2,816
Foreign currency translation adjustments	3,641	707
Net unrealized losses on investments in securities	3,045	361
Capital loss carryforward	1,691	0
Allowance for credit losses	1,642	1,719
Title loss provisions	1,081	1,191
Investments	1,017	1,161
Deferred payroll taxes	0	1,782
Other	680	821
Deferred tax assets – gross	81,097	61,686
Valuation allowance	(6,202)	(2,279)
Deferred tax assets – net	74,895	59,407
Deferred tax liabilities:
Amortization – goodwill and other intangibles	(35,807)	(30,307)
Title loss provisions	(21,133)	(18,233)
Other intangible assets from acquisitions	(20,990)	(34,180)
Fixed assets	(11,072)	(10,074)
Net unrealized gains on investments in securities	(4,325)	(7,131)
Investments	(2,423)	(989)
Deferred compensation on life insurance policies	(2,157)	(2,517)
Other	(1,014)	(909)
Deferred tax liabilities - gross	(98,921)	(104,340)
Net deferred income tax liability	$ (24,026)	$ (44,933)