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Stock-Based Compensation Plans (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock based compensation expense	$ 403,000	$ 231,000
Unrecognized compensation cost	$ 2,737,000
Unrecognized compensation cost, weighted-average remaining term	2 years 2 months 12 days
Stock-based compensation expense expected to be recorded	$ 379,000
Stock based compensation, income tax benefit	94,000	54,000
Proceeds from stock options exercised		$ 108,000
First Bancorp 2014 Equity Plan [Member]
Shares remaining available for grant	727,934
First Bancorp Plans [Member]
Stock options outstanding	9,000
Exercise price	$ 14.35

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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