Employee Benefit Plans

3 Months Ended

Mar. 31, 2016

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, 2016 and 2015, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2016			2015
Service cost	$	3,220		$	3,600
Interest cost	7,180			6,748
Expected return on assets	(9,159		)	(8,295		)
Amortization of prior service cost	52			53
Amortization of net actuarial loss	1,600			2,833
Net periodic benefit cost	$	2,893		$	4,939

Bancorporation Plan

For the three months ended March 31, 2016 and 2015, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2016			2015
Service cost	$	650		$	933
Interest cost	1,675			1,628
Expected return on assets	(2,779		)	(2,869		)
Net periodic benefit cost	$	(454	)	$	(308	)

No contributions were made during the three months ended March 31, 2016 to the BancShares or Bancorporation pension plans. BancShares does not expect to make any contributions to either of the defined benefit pension plans during 2016.