Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

BancShares Plan

For the three and nine months ended September 30, 2016 and 2015, the components of net periodic benefit cost are as follows:



	Three months ended September 30						Nine months ended September 30
(Dollars in thousands)	2016			2015			2016			2015
Service cost	$	3,153		$	3,358		$	9,463		$	10,561
Interest cost	7,218			6,732			21,668			20,230
Expected return on assets	(9,155		)	(8,302		)	(27,481		)	(24,896		)
Amortization of prior service cost	54			53			158			158
Amortization of net actuarial loss	1,714			2,863			5,144			8,531
Net periodic benefit cost	$	2,984		$	4,704		$	8,952		$	14,584

Bancorporation Plan

For the three and nine months ended September 30, 2016 and 2015, the components of net periodic benefit cost are as follows:



	Three months ended September 30						Nine months ended September 30
(Dollars in thousands)	2016			2015			2016			2015
Service cost	$	642		$	641		$	1,925		$	2,506
Interest cost	1,694			1,540			5,081			4,795
Expected return on assets	(2,775		)	(2,873		)	(8,325		)	(8,612		)
Net periodic benefit cost	$	(439	)	$	(692	)	$	(1,319	)	$	(1,311	)