XML 64 R49.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Interest-Bearing Deposits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Deposits [Abstract] |
Components of Interest-Bearing Deposits | Components of interest-bearing deposits at December 31 were as follows:
| 2017 |  | 2016
| (dollars in thousands)
Interest-bearing demand deposits | $ | 187,281 |  |  | $ | 114,043 |
Savings deposits | 3,361,840 |  |  | 2,972,747 |
Time deposits | 614,813 |  |  | 591,832 |
Total interest-bearing deposits | $ | 4,163,934 |  |  | $ | 3,678,622 |
Scheduled Maturities of Time Deposits | Included in time deposits at December 31, 2017, were certificates of deposit with the following scheduled maturities (dollars in thousands):
2018 | $ | 376,181 |
2019 | 144,091 |
2020 | 43,463 |
2021 | 35,530 |
2022 and thereafter | 15,548 |
Total | $ | 614,813 |

X
- Definition Schedule Of Deposits Liabilities Table [Text Block] + References No definition available. + Details
Name: | fcf_ScheduleOfDepositsLiabilitiesTableTableTextBlock
Namespace Prefix: | fcf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Scheduled Maturities Of Time Deposits Table [Text Block] + References No definition available. + Details
Name: | fcf_ScheduledMaturitiesOfTimeDepositsTableTextBlock
Namespace Prefix: | fcf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration