Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

BancShares Plan

For the three and six months ended June 30, 2019 and 2018, the components of net periodic benefit cost are as follows:



	Three months ended June 30						Six months ended June 30
(Dollars in thousands)	2019			2018			2019			2018
Service cost	$	2,690		$	3,362		$	5,258		$	6,791
Interest cost	7,581			7,131			15,112			14,188
Expected return on assets	(12,886		)	(11,976		)	(25,753		)	(23,933		)
Amortization of prior service cost	14			20			28			40
Amortization of net actuarial loss	2,084			3,548			4,198			6,794
Net periodic (benefit) cost	$	(517	)	$	2,085		$	(1,157	)	$	3,880

Bancorporation Plan

For the three and six months ended June 30, 2019 and 2018, the components of net periodic benefit cost are as follows:



	Three months ended June 30						Six months ended June 30
(Dollars in thousands)	2019			2018			2019			2018
Service cost	$	581		$	624		$	1,126		$	1,286
Interest cost	1,757			1,592			3,517			3,179
Expected return on assets	(2,775		)	(3,110		)	(5,543		)	(6,216		)
Amortization of net actuarial loss	637			86			1,264			157
Net periodic cost (benefit)	$	200		$	(808	)	$	364		$	(1,594	)