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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Postemployment Benefits [Abstract]

Summary of Change in Plan Assets

		Pension Plan				SERP				Postretirement Benefits
Change in Plan Assets
Fair value of plan assets at beginning of year		$	83,868,508			$	—			$	—
Actual return on plan assets			4,531,725				—				—
Employer contribution			—				312,088				47,860
Settlements			(33,447,301	)			—				—
Benefits paid			(2,749,560	)			(312,088	)			(47,860	)
Fair value of plan assets at end of year		$	52,203,372			$	—			$	—
Funded Status		$	5,852			$	(9,616,702	)		$	—
Unrecognized net actuarial (gain) loss			(992,724	)			421,264				—
Cumulative employer contributions in excess of the net periodic pension cost		$	(986,872	)		$	(9,195,438	)		$	—

		Pension Plan				SERP				Postretirement Benefits
Change in Plan Assets
Fair value of plan assets at beginning of year		$	—			$	—			$	—
Actual return on plan assets			(1,731,372	)			—				—
Employer contribution			—				38,550				18,457
Business combinations			86,008,964				—				—
Plan participants’ contributions			—				—				1,939
Benefits paid			(409,084	)			(38,550	)			(20,396	)
Fair value of plan assets at end of year		$	83,868,508			$	—			$	—
Funded Status		$	(3,993,298	)		$	(8,751,848	)		$	(1,756,423	)
Unrecognized net actuarial (gain) loss			1,767,058				(415,416	)			(103,396	)
Cumulative employer contributions in excess of the net periodic pension cost		$	(2,226,240	)		$	(9,167,264	)		$	(1,859,819	)

Summary of Change in Projected Benefit Obligation

The following tables summarize the Pension Plan, SERP and Postretirement Benefits as of December 31, 2017:

		Pension Plan				SERP				Postretirement Benefits
Change in Projected Benefit Obligation
Benefit obligation at beginning of year		$	87,861,806			$	8,751,848			$	1,756,423
Service cost			—				—				11,860
Interest cost			2,958,903				340,262				26,269
Amendments			—				—				(1,678,920	)
Actuarial (gain) loss			(2,426,328	)			836,680				(67,772	)
Settlements			(33,447,301	)			—				—
Benefits paid			(2,749,560	)			(312,088	)			(47,860	)
Benefit obligation at end of year		$	52,197,520			$	9,616,702			$	—

The following tables summarize the Pension Plan, SERP and Postretirement Benefits as of December 31, 2016:

		Pension Plan				SERP				Postretirement Benefits
Change in Projected Benefit Obligation
Benefit obligation at beginning of year		$	—			$	—			$	—
Service cost			—				—				8,169
Interest cost			530,839				51,696				11,097
Plan participants’ contributions			—				—				1,939
Actuarial (gain) loss			(965,046	)			(415,416	)			(103,396	)
Business combinations			88,705,097				9,154,118				1,859,010
Benefits paid			(409,084	)			(38,550	)			(20,396	)
Benefit obligation at end of year		$	87,861,806			$	8,751,848			$	1,756,423

Summary of Amounts Recognized in Statement of Financial Position

	Pension Plan				SERP				Postretirement Benefits
Amounts Recognized in the Statement of Financial Position
Noncurrent assets		$	5,852			$	—			$	—
Current liabilities			—				(505,169	)			—
Noncurrent liabilities			—				(9,111,533	)			—
Net amount recognized		$	5,852			$	(9,616,702	)		$	—

	Pension Plan				SERP				Postretirement Benefits
Amounts Recognized in the Statement of Financial Position
Noncurrent assets		$	—			$	—			$	—
Current liabilities			—				(422,656	)			(113,268	)
Noncurrent liabilities			(3,993,298	)			(8,329,192	)			(1,643,155	)
Net amount recognized		$	(3,993,298	)		$	(8,751,848	)		$	(1,756,423	)

Summary of Amounts Recognized in Accumulated Other Comprehensive Income

		Pension Plan				SERP				Postretirement Benefits
Amounts Recognized in Accumulated Other Comprehensive Income
Net actuarial loss (gain)		$	(992,724	)		$	421,264			$	—
Total (before tax effects)		$	(992,724	)		$	421,264			$	—

		Pension Plan				SERP				Postretirement Benefits
Amounts Recognized in Accumulated Other Comprehensive Income
Net actuarial loss (gain)		$	1,767,058			$	(415,416	)		$	(103,396	)
Total (before tax effects)		$	1,767,058			$	(415,416	)		$	(103,396	)

Summary of Information for Pension Plans With Accumulated Benefit Obligation in Excess of Plan Assets

		Pension Plan				SERP				Postretirement Benefits
Information for Pension Plans with an Accumulated Benefit Obligation in excess of Plan Assets
Projected benefit obligation		$	52,197,520			$	9,616,702			$	—
Accumulated benefit obligation		$	52,197,520			$	9,616,702			$	—
Fair value of plan assets		$	52,203,372			$	—			$	—

	Pension Plan				SERP				Postretirement Benefits
Information for Pension Plans with an Accumulated Benefit Obligation in excess of Plan Assets
Projected benefit obligation		$	87,861,806			$	8,751,848			$	—
Accumulated benefit obligation		$	87,861,806			$	8,751,848			$	—
Fair value of plan assets		$	83,868,508			$	—			$	—

Summary of Weighted-Average Assumptions for Disclosure

	Pension Plan				SERP				Postretirement Benefits
Weighted-average assumptions for Disclosure
Discount rate			1.80	%			3.35	%			3.75	%
Rate of compensation increase			N/A				N/A				N/A

	Pension Plan				SERP				Postretirement Benefits
Weighted-average assumptions for Disclosure
Discount rate			3.62	%			3.80	%			4.00	%
Rate of compensation increase			N/A				N/A				N/A

Summary of Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income

Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income
		Pension Plan				SERP				Postretirement Benefits
Net periodic benefit cost
Service cost		$	—			$	—			$	11,860
Interest cost			2,958,903				340,262				26,269
Expected return on plan assets			(3,562,150	)			—				—
Recognized actuarial (gain) loss			—				—				(2,079	)
Curtailment charge (credit)			—				—				(1,678,920	)
Recognized actuarial (gain) loss due to settlements			(636,121	)			—				(169,089	)
Net periodic benefit cost		$	(1,239,368	)		$	340,262			$	(1,811,959	)

Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income
		Pension Plan				SERP				Postretirement Benefits
Net periodic benefit cost
Service cost		$	—			$	—			$	8,169
Interest cost			530,839				51,696				11,097
Expected return on plan assets			(1,000,732	)			—				—
Net periodic benefit cost		$	(469,893	)		$	51,696			$	19,266

Summary of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income

		Pension Plan				SERP				Postretirement Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net actuarial (gain) loss		$	(3,395,903	)		$	836,680			$	(67,772	)
Recognized actuarial (gain) loss			—				—				2,079
Prior service cost (credit)			—				—				(1,678,920	)
Prior service cost (credit) due to curtailment			—				—				1,678,920
Recognized actuarial (gain) loss due to settlements			636,121				—				169,089
Total recognized in other comprehensive income (before tax effects)		$	(2,759,782	)		$	836,680			$	103,396
Total recognized in net benefit cost and other comprehensive income (before tax effects)		$	(3,999,150	)		$	1,176,942			$	(1,708,563	)

	Pension Plan				SERP				Postretirement Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net actuarial (gain) loss		$	1,767,058			$	(415,416	)		$	(103,396	)
Total recognized in other comprehensive income (before tax effects)		$	1,767,058			$	(415,416	)		$	(103,396	)
Total recognized in net benefit cost and other comprehensive income (before tax effects)		$	1,297,165			$	(363,720	)		$	(84,130	)

Summary of Amounts Expected to be Recognized in Net Periodic Cost in Coming Year

		Pension Plan				SERP				Postretirement Benefits
Amounts Expected to be Recognized in Net Periodic Cost in the Coming Year
(Gain) loss recognition		$	(992,724	)		$	—			$	—
Prior service cost recognition		$	—			$	—			$	—
Net initial obligation (asset) recognition		$	—			$	—			$	—

Pension Plan

SERP

Postretirement Benefits

Amounts Expected to be Recognized in Net Periodic Cost in the Coming Year

(Gain) loss recognition

$

—

$

—

$

—

Prior service cost recognition

$

—

$

—

$

—

Net initial obligation (asset) recognition

$

—

$

—

$

—

Summary of Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost

	Pension Plan				SERP				Postretirement Benefits
Weighted-average assumptions used to determine Net Periodic Benefit Cost
Discount rate			3.59	%			3.80	%			4.00	%
Expected return on plan assets			7.00	%			N/A				N/A
Rate of compensation increase			N/A				N/A				N/A
Corridor			10.00	%			10.00	%			10.00	%

	Pension Plan				SERP				Postretirement Benefits
Weighted-average assumptions used to determine Net Periodic Benefit Cost
Discount rate			3.60	%			3.40	%			3.60	%
Expected return on plan assets			7.00	%			N/A				N/A
Rate of compensation increase			N/A				N/A				N/A
Corridor			10.00	%			10.00	%			10.00	%

Summary of Weighted-Average Assets Allocation

Pension Plan

SERP

Postretirement Benefits

Weighted-Average Assets Allocation

Fixed income

65.40

%

N/A

N/A

Cash equivalents

34.60

%

N/A

N/A

Total

100.00

%

N/A

N/A

Pension Plan

SERP

Postretirement Benefits

Weighted-Average Assets Allocation

Equity securities

28.92

%

N/A

N/A

Fixed income

71.08

%

N/A

N/A

Total

100.00

%

N/A

N/A

Schedule of Asset Category

Pension Plan

SERP

Postretirement Benefits

Asset Category (all Level 1)

Fixed income funds

34,141,339

N/A

N/A

Money market funds

18,062,033

N/A

N/A

Total

52,203,372

N/A

N/A

Pension Plan

SERP

Postretirement Benefits

Asset Category (all Level 1)

U.S. equity funds

8,764,507

N/A

N/A

International equity funds

15,489,743

N/A

N/A

Fixed income funds

59,614,258

N/A

N/A

Total

83,868,508

N/A

N/A

Summary of Estimated Future Benefit Payments

Estimated Future Benefit Payments
2018		$	52,237,000			$	505,169			$	—
2019		$	—			$	515,688			$	—
2020		$	—			$	511,503			$	—
2021		$	—			$	536,062			$	—
2022		$	—			$	532,639			$	—
2023-2027		$	—			$	2,825,601			$	—

Summary of Estimated Contributions

	Pension Plan				SERP				Postretirement Benefits
Contributions
Estimated contributions for 2018		$	200,000			$	505,169			$	—

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