Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2018

Defined Benefit Plan [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following tables provide the components of net periodic benefit costs for the three and six-month periods ended June 30, 2018 and 2017.

				Select
	Employees'			Executive		Postretirement
	Pension			Retirement		Benefit
	Plan			Plan		Plans
Net Periodic Benefit Cost
For the Three Months Ended June 30, 2018:
Service Cost 1	$	431		$	196	$	35
Interest Cost 2	274			54		68
Expected Return on Plan Assets 2	(896		)	—		—
Amortization of Prior Service (Credit) Cost 2	(13		)	15		53
Amortization of Net Loss 2	64			33		6
Net Periodic (Benefit) Cost	$	(140	)	$	298	$	162
Plan Contributions During the Period	$	—		$	117	$	102
For the Three Months Ended June 30, 2017:
Service Cost 1	$	350		$	10	$	37
Interest Cost 2	373			59		63
Expected Return on Plan Assets 2	(800		)	—		—
Amortization of Prior Service (Credit) Cost 2	(14		)	14		(3		)
Amortization of Net Loss 2	148			33		—
Net Periodic (Benefit) Cost	$	57		$	116	$	97
Plan Contributions During the Period	$	—		$	116	$	177
Net Periodic Benefit Cost
For the Six Months Ended June 30, 2018:
Service Cost 1	$	779		$	207	$	68
Interest Cost 2	799			104		167
Expected Return on Plan Assets 2	(1,681		)	—		—
Amortization of Prior Service (Credit) Cost 2	(25		)	29		50
Amortization of Net Loss 2	97			66		—
Net Periodic (Benefit) Cost	$	(31	)	$	406	$	285
Plan Contributions During the Period	$	—		$	233	$	119
Estimated Future Contributions in the Current Fiscal Year	$	—		$	—	$	—

For the Six Months Ended June 30, 2017:
Service Cost 1	$	700		$	20	$	74
Interest Cost 2	723			109		149
Expected Return on Plan Assets 2	(1,600		)	—		—
Amortization of Prior Service (Credit) Cost 2	(28		)	28		(6		)
Amortization of Net Loss 2	296			63		—
Net Periodic (Benefit) Cost	$	91		$	220	$	217
Plan Contributions During the Period	$	—		$	229	$	230

Footnotes:

1. Included in Salaries and Employee Benefits on the Consolidated Statements of Income

2. Included in Other Operating Expense on the Consolidated Statements of Income