Fair Values of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Investments, All Other Investments [Abstract]

Carrying Amounts and Fair Values of Company's Financial Instruments

September 30, 2021	Carrying Amount		Estimated Fair Value		Fair Value Measurements Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(in thousands)
Financial assets:
Securities held-to-maturity	$	3,211,977	$	3,207,259	$	—	$	3,207,259	$	—
Loans (1)		2,890,713		2,796,258		—		—		2,796,258
Financial liabilities:
Time deposits		348,296		345,677		—		345,677		—
Other borrowed funds		118,786		122,013		—		122,013		—
Subordinated debentures		36,083		36,083		—		36,083		—
December 31, 2020
Financial assets:
Securities held-to-maturity	$	2,509,088	$	2,579,103	$	—	$	2,579,103	$	—
Loans (1)		2,960,343		2,902,390		—		—		2,902,390
Financial liabilities:
Time deposits		546,143		556,470		—		556,470		—
Other borrowed funds		177,009		183,000		—		183,000		—
Subordinated debentures		36,083		36,083		—		36,083		—

(1) Comprised of loans (including collateral dependent impaired loans), net of deferred loan costs and the allowance for loan losses.