XML 27 R12.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Supplemental Comprehensive Income Disclosures | 12 Months Ended
--- | ---
Dec. 31, 2017
Supplemental Comprehensive Income Disclosures [Abstract] |
Supplemental Comprehensive Income Disclosures | Supplemental Comprehensive Income Disclosures The following table identifies the related tax effects allocated to each component of other comprehensive income in the Consolidated Statements of Comprehensive Income as of December 31. Reclassification adjustments related to securities available for sale are included in the “Net securities gains (losses)” line in the Consolidated Statements of Income and reclassification adjustments related to losses on derivatives are included in the "Other operating expenses" line in the Consolidated Statements of Income.
| 2017 |  | 2016 |  | 2015
| Pretax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount |  | Pretax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount |  | Pretax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount
| (dollars in thousands)
Unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on securities arising during the period | $ | 7,023 |  |  | $ | (2,458 | ) |  | $ | 4,565 |  |  | $ | (6,304 | ) |  | $ | 2,206 |  |  | $ | (4,098 | ) |  | $ | 2,798 |  |  | $ | (978 | ) |  | $ | 1,820 |
Reclassification adjustment for (gains) losses on securities included in net income | (5,040 | ) |  | 1,764 |  |  | (3,276 | ) |  | (617 | ) |  | 216 |  |  | (401 | ) |  | 153 |  |  | (54 | ) |  | 99 |
Total unrealized gains (losses) on securities | 1,983 |  |  | (694 | ) |  | 1,289 |  |  | (6,921 | ) |  | 2,422 |  |  | (4,499 | ) |  | 2,951 |  |  | (1,032 | ) |  | 1,919 |
Unrealized gains (losses) on derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding (losses) gains on derivatives arising during the period | (901 | ) |  | 315 |  |  | (586 | ) |  | (479 | ) |  | 168 |  |  | (311 | ) |  | 450 |  |  | (158 | ) |  | 292 |
Reclassification adjustment for losses (gains) on derivatives included in net income | 119 |  |  | (42 | ) |  | 77 |  |  | (70 | ) |  | 24 |  |  | (46 | ) |  | (49 | ) |  | 17 |  |  | (32 | )
Total unrealized (losses) gains on derivatives | (782 | ) |  | 273 |  |  | (509 | ) |  | (549 | ) |  | 192 |  |  | (357 | ) |  | 401 |  |  | (141 | ) |  | 260 |
Unrealized gains (losses) for postretirement obligations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain (loss) | 94 |  |  | (20 | ) |  | 74 |  |  | 331 |  |  | (116 | ) |  | 215 |  |  | (102 | ) |  | 36 |  |  | (66 | )
Total unrealized gains (losses) for postretirement obligations | 94 |  |  | (20 | ) |  | 74 |  |  | 331 |  |  | (116 | ) |  | 215 |  |  | (102 | ) |  | 36 |  |  | (66 | )
Total other comprehensive income (loss) | $ | 1,295 |  |  | $ | (441 | ) |  | $ | 854 |  |  | $ | (7,139 | ) |  | $ | 2,498 |  |  | $ | (4,641 | ) |  | $ | 3,250 |  |  | $ | (1,137 | ) |  | $ | 2,113 |
The following table details the change in components of OCI for the year-ended December 31:
| 2017
| Securities Available for Sale |  | Derivatives |  | Post-Retirement Obligation |  | Accumulated Other Comprehensive Income
| (dollars in thousands)
Balance at January 1 | $ | (7,455 | ) |  | $ | 203 |  |  | $ | 225 |  |  | $ | (7,027 | )
Other comprehensive income before reclassification adjustment | 4,565 |  |  | (586 | ) |  |  |  | 3,979 |
Amounts reclassified from accumulated other comprehensive income (loss) | (3,276 | ) |  | 77 |  |  |  |  | (3,199 | )
Net gain |  |  |  |  | 74 |  |  | 74 |
Net other comprehensive income during the period | 1,289 |  |  | (509 | ) |  | 74 |  |  | 854 |
Balance at December 31 | $ | (6,166 | ) |  | $ | (306 | ) |  | $ | 299 |  |  | $ | (6,173 | )
| 2016
| Securities Available for Sale |  | Derivatives |  | Post-Retirement Obligation |  | Accumulated Other Comprehensive Income
| (dollars in thousands)
Balance at January 1 | $ | (2,956 | ) |  | $ | 560 |  |  | $ | 10 |  |  | $ | (2,386 | )
Other comprehensive income before reclassification adjustment | (4,098 | ) |  | (311 | ) |  |  |  | (4,409 | )
Amounts reclassified from accumulated other comprehensive income (loss) | (401 | ) |  | (46 | ) |  |  |  | (447 | )
Net gain |  |  |  |  | 215 |  |  | 215 |
Net other comprehensive income during the period | (4,499 | ) |  | (357 | ) |  | 215 |  |  | (4,641 | )
Balance at December 31 | $ | (7,455 | ) |  | $ | 203 |  |  | $ | 225 |  |  | $ | (7,027 | )
| 2015
| Securities Available for Sale |  | Derivatives |  | Post-Retirement Obligation |  | Accumulated Other Comprehensive Income
| (dollars in thousands)
Balance at January 1 | $ | (4,875 | ) |  | $ | 300 |  |  | $ | 76 |  |  | $ | (4,499 | )
Other comprehensive income before reclassification adjustment | 1,820 |  |  | 292 |  |  |  |  | 2,112 |
Amounts reclassified from accumulated other comprehensive income (loss) | 99 |  |  | (32 | ) |  |  |  | 67 |
Net gain |  |  |  |  | (66 | ) |  | (66 | )
Net other comprehensive income during the period | 1,919 |  |  | 260 |  |  | (66 | ) |  | 2,113 |
Balance at December 31 | $ | (2,956 | ) |  | $ | 560 |  |  | $ | 10 |  |  | $ | (2,386 | )

X
- Definition Supplemental Comprehensive Income Disclosures [Abstract] + References No definition available. + Details
Name: | fcf_SupplementalComprehensiveIncomeDisclosuresAbstract
Namespace Prefix: | fcf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
Name: | us-gaap_ComprehensiveIncomeNoteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration