Basis of presentation (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification [Line items]
Income tax credits and adjustments		$ 22,900		$ 22,900
Other operating expenses	$ 27,502		$ 22,852	55,774	$ 47,213
PR
Reclassification [Line items]
Deferred tax asset valuation allowance	$ (235)		$ 994	2,328	$ (3,572)
US federal taxes and Puerto Rico taxes
Reclassification [Line items]
Income tax credits and adjustments		6,500
Prior period correction adjustment
Reclassification [Line items]
Income tax credits and adjustments		16,500		16,500
Other operating expenses		6,400		6,400
Prior period correction adjustment | BHC
Reclassification [Line items]
Deferred tax asset valuation allowance				53,700
Prior period correction adjustment | Tax Year 2023
Reclassification [Line items]
Income tax credits and adjustments				5,500
Prior period correction adjustment | Tax Year 2022
Reclassification [Line items]
Income tax credits and adjustments				5,400
Prior period correction adjustment | Prior to tax year 2022
Reclassification [Line items]
Income tax credits and adjustments				$ 5,600
Other operating expenses		$ 3,000