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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The components of income tax expense for the years ended December 31, are as follows:
Year ended December 31,
($ in thousands)202020192018
Current:
Federal$25,132 $15,470 $9,621 
State and local5,009 2,027 2,432 
Total current30,141 17,497 12,053 
Deferred:
Federal(10,651)4,262 2,812 
State and local(1,927)1,538 495 
Total deferred(12,578)5,800 3,307 
Total income tax expense$17,563 $23,297 $15,360 
Schedule of Income Tax Rate Reconciliation
A reconciliation of expected income tax expense, computed by applying the statutory federal income tax rate in 2020, 2019, and 2018 to income before income taxes and the amounts reflected in the consolidated statements of operations is as follows:
Year ended December 31,
($ in thousands)202020192018
Income tax expense at statutory rate$19,309 $24,368 $21,961 
Increase (reduction) in income tax resulting from:
Tax-exempt interest income, net(2,010)(962)(506)
State and local income taxes, net3,254 2,816 2,423 
Bank-owned life insurance, net(778)(628)(452)
Non-deductible expenses637 749 294 
Tax benefit (expense) of LIHTC investments, net(444)(278)(50)
Excess tax benefits(175)(526)(1,631)
Federal tax credits(1,327)(913)(4,627)
Subsidiary dividend timing election— — (2,728)
Non-taxable donation to charitable foundation— (420)— 
Other, net(903)(909)676 
       Total income tax expense$17,563 $23,297 $15,360 
Schedule of Deferred Tax Assets and Deferred Tax Liabilities The tax effect of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities is as follows:
Year ended December 31,
($ in thousands)20202019
Deferred tax assets:
Allowance for loan losses$34,031 $10,692 
Acquired loans— 9,722 
Loans held-for-sale8,058 — 
Other real estate896 657 
Deferred compensation2,585 2,462 
Accrued compensation5,391 1,607 
Net operating losses and tax credits6,460 7,066 
Other deferred tax assets3,086 791 
Total deferred tax assets60,507 32,997 
Deferred tax liabilities:
Acquired loans3,413 — 
Unrealized gains on securities12,189 5,847 
Intangible assets7,800 7,432 
Other deferred tax liabilities4,369 2,407 
Total deferred tax liabilities27,771 15,686 
Net deferred tax asset before valuation allowance32,736 17,311 
Less: valuation allowance2,932 2,932 
Net deferred tax asset$29,804 $14,379 
Schedule of Unrecognized Tax Benefits
The activity in the gross liability for unrecognized tax benefits was as follows:
($ in thousands)202020192018
Balance at beginning of year$1,497 $1,301 $1,244 
Additions based on tax positions related to the current year395 401 367 
Additions for tax positions of prior years1,556 62 50 
Settlements or lapse of statute of limitations(291)(267)(360)
Balance at end of year$3,157 $1,497 $1,301