Employee Benefits - Defined Benefit Pension Plan's Funded (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 100,000	$ 100,000	$ 100,000
Interest cost	165,000	192,000	221,000
Fair value of plan assets at beginning of period	6,130,000
Employer contributions	0	1,300,000	900,000
Fair value of plan assets at end of year	5,656,000	6,130,000
Expected return on plan assets	(319,000)	(261,000)	(234,000)
Net loss amortization		65,000	53,000
Cost of settlements		45,000	156,000
Net periodic benefit cost	(54,000)	141,000	296,000
Amortization of net actuarial loss		65,000	53,000
Net actuarial gain (loss)	265,000	48,000	(226,000)
Adjustment for settlement		45,000	156,000
Gains (losses) on pension liability	265,000	158,000	(17,000)
Tax effect	(62,000)	(37,000)	4,000
Net unrealized gains (losses) on pension liability	203,000	121,000	(13,000)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of period	5,909,000	5,785,000
Service cost	100,000	100,000
Interest cost	165,000	192,000
Actuarial loss (gain)	(797,000)	224,000
Administrative expenses paid	(36,000)	(40,000)
Benefits paid	(225,000)	(77,000)
Settlements		(275,000)
Benefit obligation at end of year	5,116,000	5,909,000	5,785,000
Fair value of plan assets at beginning of period	6,130,000	4,689,000
Return on plan assets	(213,000)	533,000
Employer contributions		1,300,000
Administrative expenses paid	(36,000)	(40,000)
Benefits paid	(225,000)	(77,000)
Settlements		(275,000)
Fair value of plan assets at end of year	5,656,000	6,130,000	$ 4,689,000
Funded status	$ 540,000	$ 221,000