Deposits - Maturity Distribution of Time Certificates of Deposits (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Maturity distribution of time certificates of deposit
Three months or less	$ 1,296,921
Over three through six months	808,594
Over six through twelve months	1,281,193
One to two years	172,488
Two to three years	48,735
Three to four years	31,777
Four to five years	20,464
Thereafter	959
Total	3,661,131
Under $250,000
Maturity distribution of time certificates of deposit
Three months or less	202,932
Over three through six months	268,176
Over six through twelve months	785,036
One to two years	114,912
Two to three years	41,313
Three to four years	26,248
Four to five years	17,012
Thereafter	313
Total	1,455,942
$250,000 or More
Maturity distribution of time certificates of deposit
Three months or less	1,093,989
Over three through six months	540,418
Over six through twelve months	496,157
One to two years	57,576
Two to three years	7,422
Three to four years	5,529
Four to five years	3,452
Thereafter	646
Total	$ 2,205,189