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Stock-Based Compensation (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) director shares	Mar. 31, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 700,000	$ 1,100,000
Stock-based compensation tax benefit	$ 153,000	$ 259,000
Non-Employee Director Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of directors | director	14
Director equity grants granted, value				$ 37,500
Non-Employee Director Awards | Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Director equity grants granted, value			$ 37,500
Long-Term Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 4,600,000
Unrecognized compensation expense, period for recognition	1 year 8 months 12 days
Long-Term Restricted Stock Awards | Next Twelve Months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 3,000,000.0
Long-Term Restricted Stock Awards | Remaining Quarters of 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 2,600,000
First Bancorp 2014 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for grant | shares	191,593

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