Variable interest entities ("VIEs") - Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 38,405	$ 33,150	$ 28,835
Other assets	151,924	112,534
Total Assets	3,722,415	3,382,726
Total Liabilities	2,725,386	2,532,331
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	250	0
Other assets	18,350	0
Total Assets	18,600	0
Other liabilities	34	0
Total Liabilities	$ 34	$ 0