Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss (NOL) carryforwards	$ 24,375	$ 24,992
Accrued expenses	23,341	23,249
Tax credit carryforwards	11,551	4,173
Capitalized research and development costs	8,404	5,959
Federal offset to Canadian deferred tax liability	7,418	10,339
Foreign currency translation adjustments	2,705	3,641
Net unrealized losses on investments in securities	1,957	3,045
Allowance for credit losses	1,707	1,642
Title loss provisions	1,081	1,081
Investments	532	1,017
Capital loss carryforward	0	1,691
Other	287	268
Deferred tax assets – gross	83,358	81,097
Valuation allowance	(13,362)	(6,202)
Deferred tax assets – net	69,996	74,895
Deferred tax liabilities:
Amortization – goodwill and other intangibles	(43,279)	(35,807)
Title loss provisions	(17,667)	(21,133)
Other intangible assets from acquisitions	(15,518)	(20,990)
Fixed assets	(8,828)	(11,072)
Deferred compensation on life insurance policies	(2,628)	(2,157)
Net unrealized gains on investments in securities	(1,898)	(4,325)
Investments	(1,067)	(2,423)
Other	(380)	(1,014)
Deferred tax liabilities - gross	(91,265)	(98,921)
Net deferred income tax liability	$ (21,269)	$ (24,026)