XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Employee Benefit Plans (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2016
BancShares Plan |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Benefit Costs | BancShares Plan For the three and six months ended June 30, 2016 and 2015, the components of net periodic benefit cost are as follows:
| Three months ended June 30 |  | Six months ended June 30
(Dollars in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Service cost | $ | 3,090 |  |  | $ | 3,603 |  |  | $ | 6,310 |  |  | $ | 7,203 |
Interest cost | 7,269 |  |  | 6,750 |  |  | 14,450 |  |  | 13,498 |
Expected return on assets | (9,167 | ) |  | (8,299 | ) |  | (18,326 | ) |  | (16,594 | )
Amortization of prior service cost | 52 |  |  | 52 |  |  | 104 |  |  | 105 |
Amortization of net actuarial loss | 1,830 |  |  | 2,835 |  |  | 3,430 |  |  | 5,668 |
Net periodic benefit cost | $ | 3,074 |  |  | $ | 4,941 |  |  | $ | 5,968 |  |  | $ | 9,880 |
Bancorporation Plan |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Benefit Costs | Bancorporation Plan For the three and six months ended June 30, 2016 and 2015, the components of net periodic benefit cost are as follows:
| Three months ended June 30 |  | Six months ended June 30
(Dollars in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Service cost | $ | 633 |  |  | $ | 932 |  |  | $ | 1,283 |  |  | $ | 1,865 |
Interest cost | 1,713 |  |  | 1,627 |  |  | 3,388 |  |  | 3,255 |
Expected return on assets | (2,771 | ) |  | (2,870 | ) |  | (5,550 | ) |  | (5,739 | )
Net periodic benefit cost | $ | (425 | ) |  | $ | (311 | ) |  | $ | (879 | ) |  | $ | (619 | )

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=fcnca_BancSharesPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=fcnca_BancorporationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |