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Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Assets:
Securities available for sale, at fair value	$ 2,233,744	$ 2,285,611
Equity investments with readily determinable fair value	59,049	59,699
Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	904,659	1,001,317
Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	637,828	681,013
Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	537,788	507,879
Corporate securities
Assets:
Securities available for sale, at fair value	13,205	6,134
Municipal securities
Assets:
Securities available for sale, at fair value	105,415	89,268
Asset-backed Securities
Assets:
Securities available for sale, at fair value	34,849
Recurring basis
Assets:
Equity investments with readily determinable fair value	27,128	27,611
Recurring basis | Interest rate swaps
Assets:
Derivative assets	21,886	34,606
Liabilities:
Derivative liabilities	21,886	34,606
Recurring basis | Mortgage banking derivatives
Assets:
Derivative assets	356	724
Liabilities:
Derivative liabilities	50	110
Recurring basis | Other derivatives
Assets:
Derivative assets	1,218
Liabilities:
Derivative liabilities	95	1,000
Recurring basis | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	904,659	1,001,317
Recurring basis | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	637,828	681,013
Recurring basis | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	537,788	507,879
Recurring basis | Corporate securities
Assets:
Securities available for sale, at fair value	13,205	6,134
Recurring basis | Municipal securities
Assets:
Securities available for sale, at fair value	105,415	89,268
Recurring basis | Asset-backed Securities
Assets:
Securities available for sale, at fair value	34,849
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Equity investments with readily determinable fair value	27,128	27,611
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage banking derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other derivatives
Assets:
Derivative assets	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed Securities
Assets:
Securities available for sale, at fair value	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Equity investments with readily determinable fair value	0	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate swaps
Assets:
Derivative assets	21,886	34,606
Liabilities:
Derivative liabilities	21,886	34,606
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage banking derivatives
Assets:
Derivative assets	356	724
Liabilities:
Derivative liabilities	50	110
Recurring basis | Significant Other Observable Inputs (Level 2) | Other derivatives
Assets:
Derivative assets	1,218
Liabilities:
Derivative liabilities	0	602
Recurring basis | Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	904,659	1,001,317
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	637,828	681,013
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	537,788	507,879
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities
Assets:
Securities available for sale, at fair value	13,205	6,134
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Securities available for sale, at fair value	104,350	88,246
Recurring basis | Significant Other Observable Inputs (Level 2) | Asset-backed Securities
Assets:
Securities available for sale, at fair value	34,849
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Equity investments with readily determinable fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Interest rate swaps
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage banking derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Other derivatives
Assets:
Derivative assets	0
Liabilities:
Derivative liabilities	95	398
Recurring basis | Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Municipal securities
Assets:
Securities available for sale, at fair value	1,065	$ 1,022
Recurring basis | Significant Unobservable Inputs (Level 3) | Asset-backed Securities
Assets:
Securities available for sale, at fair value	$ 0
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Discount Rate | Accounts Receivable | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.20
Discount Rate | Accounts Receivable | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.60
Discount Rate | Inventory | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.50
Discount Rate | Inventory | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.70

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