Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2015

BancShares Plan

For the three and six months ended June 30, 2015 and 2014, the components of net periodic benefit cost are as follows:



	Three months ended June 30						Six months ended June 30
(Dollars in thousands)	2015			2014			2015			2014
Service cost	$	3,603		$	2,785		$	7,203		$	6,166
Interest cost	6,750			6,251			13,498			12,807
Expected return on assets	(8,299		)	(8,340		)	(16,594		)	(16,152		)
Amortization of prior service cost	52			52			105			105
Amortization of net actuarial loss	2,835			1,546			5,668			3,092
Net periodic benefit cost	$	4,941		$	2,294		$	9,880		$	6,018

Bancorporation Plan

For the three and six months ended June 30, 2015, the components of net periodic benefit cost are as follows:



	Three months ended June 30			Six months ended June 30
(Dollars in thousands)	2015			2015
Service cost	$	932		$	1,865
Interest cost	1,627			3,255
Expected return on assets	(2,870		)	(5,739		)
Amortization of prior service cost	—			—
Amortization of net actuarial loss	—			—
Net periodic benefit cost	$	(311	)	$	(619	)