Fair Value Measurements and Disclosures - Level 3 Valuation (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO and other repossessed assets	$ 6,009	$ 5,997
Level 3 \| Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO and other repossessed assets	6,009
Level 3 \| Nonrecurring \| Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO and other repossessed assets	6,009	5,997
Individually evaluated loans	$ 6,759	$ 8,175
Level 3 \| Minimum \| Nonrecurring \| Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned measurement input (as percent)	0.06
Individually evaluated loans, measurement input (as a percent)	0.10	0.02
Level 3 \| Maximum \| Nonrecurring \| Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned measurement input (as percent)	0.13
Individually evaluated loans, measurement input (as a percent)	0.85	0.48
Level 3 \| Weighted Average \| Nonrecurring \| Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned measurement input (as percent)	0.10	0.10
Individually evaluated loans, measurement input (as a percent)	0.28	0.24

Meridian Corp 10-Q