XML 48 R38.htm IDEA: XBRL DOCUMENT v3.24.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2024
USD ($)
Segment
shares
Sep. 30, 2023
USD ($)
shares
Dec. 31, 2026
shares
Dec. 31, 2025
shares
Jun. 30, 2024
USD ($)
Apr. 30, 2024
shares
Dec. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Summary Of Significant Accounting Policies [Line Items]                      
Net increase to retained earnings | $ $ 415,186,000   $ 415,186,000           $ 394,094,000    
Reduction to allowance for credit losses | $ (71,283,000) $ (68,592,000) $ (71,283,000) $ (68,592,000)     $ (67,984,000)   (65,888,000) $ (62,704,000) $ (60,829,000)
Number of operating segments | Segment     2                
Federal funds sales periods     1 day                
Interest-earning deposits maturities period     1 year                
Servicing rights | $     $ 0                
Amount of loans serviced | $ $ 157,000,000   $ 157,000,000           162,900,000    
Threshold period for loan     30 days                
Threshold for determining nonaccrual status 90 days   90 days                
Settled in cash     100,349                
Stock options granted 0   0                
Unrecognized compensation cost | $ $ 0   $ 0                
Issuance of shares for Employee Stock Purchase Plan, shares 11,257 8,850 27,016 26,491              
Antidilutive securities 125,152 235,902 277,141 416,712              
Phantom Plan                      
Summary Of Significant Accounting Policies [Line Items]                      
Stock options granted     262,811                
2024 ESPP                      
Summary Of Significant Accounting Policies [Line Items]                      
Number of share purchase rights authorized               150,000      
Restricted stock [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Settled in cash     (120,046)                
Shares granted     0                
Compensation cost | $ $ 3,400,000 $ 2,300,000 $ 9,300,000 $ 8,600,000              
Restricted stock [Member] | Tranche One [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Stock option vesting term     3 years                
Restricted stock [Member] | Tranche Two [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Stock option vesting term     5 years                
Performance Shares [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Shares granted     4,705                
Performance Shares [Member] | Phantom Plan                      
Summary Of Significant Accounting Policies [Line Items]                      
Shares granted     110,047                
Performance Shares [Member] | 2021 Long-Term Stock Incentive Plan                      
Summary Of Significant Accounting Policies [Line Items]                      
Shares granted     0                
Restricted Stock Units [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Unrecognized compensation cost | $ 7,800,000   $ 7,800,000                
Weighted average period over which unrecognized compensation is expected to be recognized (in years)     1 year 25 days                
Restricted Stock Units [Member] | Forecast Member                      
Summary Of Significant Accounting Policies [Line Items]                      
Settled in cash         120,046 120,046          
Restricted Stock Units [Member] | 2021 Long-Term Stock Incentive Plan                      
Summary Of Significant Accounting Policies [Line Items]                      
Shares granted     0                
Employee Stock [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Compensation cost | $ 56,000 34,000 $ 131,000 140,000              
Percentage of closing market price on purchase date     85.00%                
Phantom Units                      
Summary Of Significant Accounting Policies [Line Items]                      
Unrecognized compensation cost | $ 8,600,000   $ 8,600,000                
Consumer and Other [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Reduction to allowance for credit losses | $ $ (1,026,000) $ (753,000) $ (1,026,000) $ (753,000)     $ (928,000)   (869,000) $ (695,000) $ (537,000)
Consumer and Other [Member] | Closed-end Loans [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Threshold for determining nonaccrual status 120 days   120 days                
Consumer and Other [Member] | Open-end Loans [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Threshold for determining nonaccrual status 180 days   180 days                
Small Business Administration Loans [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Loans held for sale | $ $ 4,500,000   $ 4,500,000           $ 7,200,000    
Maximum [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Cash equivalents original maturities period     90 days                
Short term borrowings original maturities period     90 days                
Finite-Lived Intangible Asset, Useful Life 15 years   15 years                
Maximum [Member] | Employee Stock Option [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Option term     10 years                
Maximum [Member] | Employee Stock [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of compensation contributable     15.00%                
Minimum [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Finite-Lived Intangible Asset, Useful Life 5 years   5 years                
Minimum [Member] | Employee Stock [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of compensation contributable     1.00%                
Peapack-Gladstone Mortgage Group, Inc. [Member] | Peapack Ventures, LLC [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of interest owned 99.00%   99.00%                
Peapack-Gladstone Mortgage Group, Inc. [Member] | Peapack-Gladstone Realty, Inc [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of interest owned 79.00%   79.00%                
PGB Trust & Investments of Delaware [Member] | Peapack Ventures, LLC [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of interest owned 1.00%   1.00%                
Peapack Ventures, LLC [Member] | Peapack-Gladstone Realty, Inc [Member]                      
Summary Of Significant Accounting Policies [Line Items]                      
Percentage of interest owned 21.00%   21.00%