Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

The status of the Company’s plans at December 31, 2017, 2016, and 2015:

	Pension Benefit Plans(a)			Post-Employment Benefit Plan
	December 31,			December 31,
	2015			2017			2016			2015
Change in benefit obligation:
Beginning of year	$	2,016		$	4,106		$	4,681		$	4,926
Service cost	—			25			36			51
Interest cost	36			122			142			141
Actuarial loss (gain)	(9		)	(261		)	(297		)	45
Benefits paid	(2,043		)	(388		)	(456		)	(482		)
Benefit obligation at end of year	$	—		$	3,604		$	4,106		$	4,681

^(a)The Company's pension benefit plans were terminated and paid as of June 2015.

Schedule of Assumptions Used

Assumptions used to determine accumulated benefit obligations as of year end:

	Post-Employment Benefit Plan
	Year Ended December 31,
	2017	2016
Discount rate	2.96%	3.15%
Measurement date	December 31, 2017	December 31, 2016

Assumptions used to determine net benefit cost (benefit) for 2017, 2016, and 2015:

	Post-Employment Benefit Plan
	Year Ended December 31,
	2017		2016		2015
Expected return on Assets	—		—		—
Discount rate	3.15	%	3.20	%	2.99	%
Average compensation increase	N/A		N/A		N/A

Schedule of Net Benefit Costs

The estimated amount that will be recognized from accumulated other comprehensive income (loss) into net periodic benefit cost during 2018:

	Post-Employment Benefit Plan
Actuarial net loss	$	(92	)
Net prior service credits	37
Net amount recognized	$	(55	)

Components of net benefit cost (benefit):

	Pension Benefit Plans(a)			Post-Employment Benefit Plan
	Year Ended December 31,			Year Ended December 31,
	2015			2017			2016			2015
Service cost	$	—		$	25		$	36		$	51
Interest cost	36			122			142			141
Expected return on assets	(45		)	—			—			—
Amortization of prior service cost	—			(339		)	(338		)	(338		)
Recognized net actuarial loss	25			184			269			278
Settlement losses	414			—			—			—
Net benefit cost (benefit)	$	430		$	(8	)	$	109		$	132

^(a)The Company's pension benefit plans were terminated and paid as of June 2015.

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)

Changes in plan assets and benefit obligations recognized in other comprehensive income:

	Pension Benefit Plans(a)			Post-Employment Benefit Plan
	Year Ended December 31,			Year Ended December 31,
	2015			2017			2016			2015
Net actuarial (loss) gain	$	(35	)	$	261		$	293		$	(35	)
Settlement losses	414			—			—			—
Recognized net actuarial loss	25			184			269			278
Amortization of prior service cost	—			(339		)	(338		)	(338		)
Total other comprehensive income (loss), pre-tax	404			106			224			(95		)
Income tax expense (benefit)	160			40			90			(41		)
Total other comprehensive income (loss), net of tax	$	244		$	66		$	134		$	(54	)

^(a)The Company's pension benefit plans were terminated and paid as of June 2015.

Schedule of Amounts Recognized in Balance Sheet

Benefit obligation recognized in the Consolidated Balance Sheets:

	Post-Employment Benefit Plan
	As of December 31,
Benefit obligation	2017			2016
Current	$	(471	)	$	(502	)
Non-Current	(3,133		)	(3,604		)
Net amount recognized	$	(3,604	)	$	(4,106	)

Schedule of Health Care Cost Trend Rates

The assumed average annual rate of increase in the per capita cost of covered benefits (health care cost trend rate):

	Post-Employment Benefit Plan
	Year Ended December 31,
	2017						2016
	Group Plan		Lifetime Prescription Cost		Medicare Supplement		Group Plan		Lifetime Prescription Cost		Medicare Supplement
Health care cost trend rate	7.00	%	9.00	%	4.50	%	7.50	%	9.00	%	5.00	%
Ultimate trend rate	5.00	%	5.00	%	4.50	%	5.00	%	5.00	%	5.00	%
Year rate reaches ultimate trend rate	2025		2027		2018		2023		2024		2017

Schedule of Expected Benefit Payments

As of December 31, 2017, the following expected benefit payments (net of Medicare Part D subsidiary for Post-Employment Benefit Plan Payments) and the related expected subsidy receipts that reflect expected future service, as appropriate, are expected to be paid to plan participants:

	Post-Employment Benefit Plan
	Expected Benefit Payments		Expected Subsidy Receipts
2018	$	486	$	15
2019	491		13
2020	469		11
2021	443		11
2022	418		9
2023-2027	1,221		30
Total	$	3,528	$	89

Schedule of Nonvested Restricted Stock Units Activity

Summary of unvested restricted stock under the Company’s share-based compensation plans for 2016 and 2015. There was no unvested restricted stock under the Company's share-based compensation plans in 2017. 

	Year Ended December 31,
	2016				2015
	Shares		Weighted Average Grant-Date Fair Value		Shares		Weighted Average Grant-Date Fair Value
Unvested balance at beginning of year	128,500		$	5.85	278,900		$	6.28
Granted	—		—		13,585		17.02
Forfeited	—		—		(30,800	)	6.27
Vested	(128,500	)	5.85		(133,185	)	7.80
Unvested balance at end of year	—		$	—	128,500		$	5.85

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

 Summary of unvested RSUs under the Company’s share-based compensation plans for 2017, 2016, and 2015: 

	Year Ended December 31,
	2017				2016				2015
	Units		Weighted Average  Grant-Date Fair Value		Units		Weighted Average  Grant-Date Fair Value		Units		Weighted Average  Grant-Date Fair Value
Unvested balance at beginning of year	527,486		$	10.17	437,946		$	7.09	413,288		$	5.09
Granted	47,514		42.93		100,892		23.15		89,702		16.63
Forfeited	(3,508	)	25.74		(11,352	)	11.55		(54,506	)	6.15
Vested	(203,000	)	4.82		—		—		(10,538	)	14.88
Unvested balance at end of year	368,492		$	17.20	527,486		$	10.17	437,946		$	7.09