Fair Value Measurements (Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	$ 149,961	$ 105,077
Total gains or losses (realized/unrealized) included in earnings	43,242	33,694
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(148)	(170)
Investment securities called	0	(6,000)
Discount accretion	5	186
Purchases of private equity securities	12,281	31,449
Sale / paydown of private equity securities	(25,437)	(16,523)
Capitalized interest/dividends	44	1,768
Purchase of risk participation agreement	459	685
Sale of risk participation agreement	(524)	(205)
Ending balance	$ 179,883	149,961
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Investment securities gains (losses), net
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Net unrealized gains (losses) on other securities
Total gains or losses for the annual period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	$ 35,503	29,129
Gains (Losses) included in OCI Attributable to Change in Unrealized Gains (Losses) Relating to Assets Still Held, Total	(148)	11
State and Municipal Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	1,984	7,968
Total gains or losses (realized/unrealized) included in earnings	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(148)	(170)
Investment securities called	0	(6,000)
Discount accretion	5	186
Purchases of private equity securities	0	0
Sale / paydown of private equity securities	0	0
Capitalized interest/dividends	0	0
Purchase of risk participation agreement	0	0
Sale of risk participation agreement	0	0
Ending balance	1,841	1,984
Total gains or losses for the annual period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	0	0
Gains (Losses) included in OCI Attributable to Change in Unrealized Gains (Losses) Relating to Assets Still Held, Total	(148)	11
Private Equity Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	147,406	94,368
Total gains or losses (realized/unrealized) included in earnings	43,833	36,344
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0
Investment securities called	0	0
Discount accretion	0	0
Purchases of private equity securities	12,281	31,449
Sale / paydown of private equity securities	(25,437)	(16,523)
Capitalized interest/dividends	44	1,768
Purchase of risk participation agreement	0	0
Sale of risk participation agreement	0	0
Ending balance	178,127	147,406
Total gains or losses for the annual period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	35,333	28,654
Gains (Losses) included in OCI Attributable to Change in Unrealized Gains (Losses) Relating to Assets Still Held, Total	0	0
Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	571	2,741
Total gains or losses (realized/unrealized) included in earnings	(591)	(2,650)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0
Investment securities called	0	0
Discount accretion	0	0
Purchases of private equity securities	0	0
Sale / paydown of private equity securities	0	0
Capitalized interest/dividends	0	0
Purchase of risk participation agreement	459	685
Sale of risk participation agreement	(524)	(205)
Ending balance	(85)	571
Total gains or losses for the annual period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	170	475
Gains (Losses) included in OCI Attributable to Change in Unrealized Gains (Losses) Relating to Assets Still Held, Total	$ 0	$ 0