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Subordinated Debentures Subordinated Debentures Outstanding (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract] |
Schedule of Subordinated Borrowing [Table Text Block] | Subordinated Debentures outstanding are as follows:
|  | June 30, 2018 |  | December 31, 2017
| Due | Amount |  | Rate |  | Amount |  | Rate
|  | (dollars in thousands)
Owed to: |  |  |  |  |  |  |  |
First Commonwealth Bank | 2028 | $ | 49,132 |  |  | 4.875% until June 1, 2023, then LIBOR + 1.845% |  |  |  |
First Commonwealth Bank | 2033 | $ | 49,005 |  |  | 5.50% until June 1, 2028, then LIBOR + 2.37% |  |  |  |
First Commonwealth Capital Trust II | 2034 | $ | 30,929 |  |  | LIBOR + 2.85% |  | $ | 30,929 |  |  | LIBOR + 2.85%
First Commonwealth Capital Trust III | 2034 | 41,238 |  |  | LIBOR + 2.85% |  | 41,238 |  |  | LIBOR + 2.85%
Total |  | $ | 170,304 |  |  |  |  | $ | 72,167 |  |  |

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- Definition Tabular disclosure of borrowings under subordinated debt agreements that qualify as available in computing net capital under SEC uniform net capital rules for broker-dealers, including restrictive covenants, collateral, interest rates and due dates, amounts due by date and amount owed in total. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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