| Component: (Network and Table) | |
|---|---|
| Network | 41601 - Disclosure - Accumulated Other Comprehensive Loss ("AOCL") (Schedule of Accumulated Other Comprehensive Loss) (Details) (http://www.mybankfirstunited.com/role/DisclosureAccumulatedOtherComprehensiveLossaoclScheduleOfAccumulatedOtherComprehensiveLossDetails) |
| Table | Statement [Table] |
| Reporting Entity [Axis] | 0000763907 (http://www.sec.gov/CIK) |
| Statement [Line Items] | Period [Axis] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | |||||||||||||
| Statement, Equity Components [Axis] | Statement, Equity Components [Axis] | |||||||||||||
| Investment securities- with OTTI [Member] | Investment Securities -All Other AFS [Member] | Investment Securities HTM [Member] | Cash Flow Hedge (OCI) [Member] | Pension Plan [Member] | SERP [Member] | Equity Component [Domain] | Investment securities- with OTTI [Member] | Investment Securities -All Other AFS [Member] | Investment Securities HTM [Member] | Cash Flow Hedge (OCI) [Member] | Pension Plan [Member] | SERP [Member] | Equity Component [Domain] | |
Balance, Beginning | ( | ( | ( | ( | ( | ( | (18,944,000) | ( | ( | ( | ( | ( | ( | ( |
Other comprehensive income/(loss) before reclassifications | ( | ( | ( | ( | ( | ( | ( | |||||||
Amounts reclassified from accumulated other comprehensive loss | ( | ( | ( | ( | ||||||||||
Balance, Ending | ( | ( | ( | ( | ( | (21,465,000) | (1,942,000) | (2,024,000) | (1,971,000) | (39,000) | (12,663,000) | (305,000) | (18,944,000) | |