XML 30 R19.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Employee Benefit Plans | 6 Months Ended
--- | ---
Jun. 30, 2017
Retirement Benefits, Description [Abstract] |
Employee Benefit Plans | EMPLOYEE BENEFIT PLANS BancShares sponsors noncontributory defined benefit pension plans for its qualifying employees (BancShares Plan) and former First Citizens Bancorporation, Inc. employees (Bancorporation Plan). Net periodic benefit cost is a component of employee benefits expense. BancShares Plan For the three and six months ended June 30, 2017 and 2016, the components of net periodic benefit cost are as follows:
| Three months ended June 30 |  | Six months ended June 30
(Dollars in thousands) | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 2,934 |  |  | $ | 3,090 |  |  | $ | 6,310 |  |  | $ | 6,310 |
Interest cost | 7,069 |  |  | 7,269 |  |  | 14,449 |  |  | 14,450 |
Expected return on assets | (10,307 | ) |  | (9,167 | ) |  | (21,005 | ) |  | (18,326 | )
Amortization of prior service cost | 53 |  |  | 52 |  |  | 105 |  |  | 104 |
Amortization of net actuarial loss | 2,193 |  |  | 1,830 |  |  | 4,427 |  |  | 3,430 |
Net periodic benefit cost | $ | 1,942 |  |  | $ | 3,074 |  |  | $ | 4,286 |  |  | $ | 5,968 |
Bancorporation Plan For the three and six months ended June 30, 2017 and 2016, the components of net periodic benefit cost are as follows:
| Three months ended June 30 |  | Six months ended June 30
(Dollars in thousands) | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 670 |  |  | $ | 633 |  |  | $ | 1,341 |  |  | $ | 1,283 |
Interest cost | 1,682 |  |  | 1,713 |  |  | 3,365 |  |  | 3,388 |
Expected return on assets | (2,796 | ) |  | (2,771 | ) |  | (5,592 | ) |  | (5,550 | )
Amortization of net actuarial loss | 214 |  |  | — |  |  | 428 |  |  | — |
Net periodic benefit cost | $ | (230 | ) |  | $ | (425 | ) |  | $ | (458 | ) |  | $ | (879 | )
No contributions were made during the three and six months ended June 30, 2017 to the BancShares or Bancorporation pension plans. BancShares expects to contribute $50.0 million to the BancShares Plan during 2017. No contribution is expected to be made to the Bancorporation Plan in 2017.

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

X
- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration