Employee Benefit Plans

3 Months Ended

Mar. 31, 2015

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

BancShares sponsors noncontributory defined benefit pension plans for its qualifying employees (BancShares Plan) and legacy Bancorporation employees (Bancorporation Plan). Net periodic benefit cost is a component of employee benefits expense.

BancShares Plan

For the three months ended March 31, 2015 and 2014, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2015			2014
Service cost	$	3,600		$	3,381
Interest cost	6,748			6,556
Expected return on assets	(8,295		)	(7,812		)
Amortization of prior service cost	53			53
Amortization of net actuarial loss	2,833			1,546
Net periodic benefit cost	$	4,939		$	3,724

Bancorporation Plan

For the three months ended March 31, 2015, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2015
Service cost	$	933
Interest cost	1,628
Expected return on assets	(2,869		)
Amortization of prior service cost	—
Amortization of net actuarial loss	—
Net periodic benefit cost	$	(308	)

No contributions were made during the three months ended March 31, 2015 to the BancShares or Bancorporation pension plans. BancShares does not expect to make any contributions to either of the defined benefit pension plans during the remainder of 2015.