XML 44 R58.htm IDEA: XBRL DOCUMENT v3.19.3
Fair Values of Financial Instruments - Carrying Amount and Fair Value of Company's Financial Instruments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Financial assets:    
Securities held-to-maturity $ 2,164,135 $ 2,046,647
Loans 2,346,564 2,257,035
Financial liabilities:    
Time deposits 533,074 560,579
Other borrowed funds 209,188 202,378
Subordinated debentures 36,083 36,083
Carrying Value [Member]    
Financial assets:    
Securities held-to-maturity 2,164,135 2,046,647
Loans 2,346,564 2,257,035 [1]
Financial liabilities:    
Time deposits 533,074 560,579
Other borrowed funds 209,188 202,378
Subordinated debentures 36,083 36,083
Estimated Fair Value [Member]    
Financial assets:    
Securities held-to-maturity 2,188,465 1,991,421
Loans 2,398,515 2,279,712 [1]
Financial liabilities:    
Time deposits 532,135 559,988
Other borrowed funds 209,263 203,122
Subordinated debentures 36,083 36,083
Fair Value Measurements, Level 2 Inputs [Member]    
Financial assets:    
Securities held-to-maturity 2,188,465 1,991,421
Financial liabilities:    
Time deposits 532,135 559,988
Other borrowed funds 209,263 203,122
Subordinated debentures 36,083 36,083
Fair Value Measurements, Level 3 Inputs [Member]    
Financial assets:    
Loans $ 2,398,515 $ 2,279,712
[1] Comprised of loans (including collateral dependent impaired loans), net of deferred loan costs and the allowance for loan losses.