Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Defined benefit pension plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

	Three Months Ended June 30,												Six Months Ended June 30,
	U.S. Plan						Non-U.S. Plans						U.S. Plan						Non-U.S. Plans
	2018			2017			2018			2017			2018			2017			2018			2017
Service cost	$	2,303		$	3,021		$	1,534		$	1,343		$	5,287		$	6,042		$	3,111		$	2,660
Interest cost	5,153			5,430			1,343			1,285			10,255			10,859			2,721			2,549
Expected return on plan assets	(9,745		)	(9,953		)	(2,037		)	(1,833		)	(19,956		)	(19,906		)	(4,128		)	(3,637		)
Amortization:
Prior service cost (credit)	339			106			(111		)	(112		)	426			213			(226		)	(222		)
Recognized actuarial loss	870			1,395			782			864			2,801			2,791			1,585			1,705
Transition obligation	—			—			1			1			—			—			2			2
Net periodic (income) expense	$	(1,080	)	$	(1	)	$	1,512		$	1,548		$	(1,187	)	$	(1	)	$	3,065		$	3,057
Less: Discontinued operations	$	273		$	846		$	73		$	203		$	950		$	1,692		$	247		$	405
Net periodic (income) expense - Continuing operations	$	(1,353	)	$	(847	)	$	1,439		$	1,345		$	(2,137	)	$	(1,693	)	$	2,818		$	2,652

Supplemental Employee Retirement Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost	$	660		$	618		$	1,355		$	1,236
Interest cost	808			1,019			1,701			2,038
Amortization:
Prior service cost	1,351			1,103			2,314			2,205
Recognized actuarial gain	(281		)	(298		)	(536		)	(596		)
Net periodic expense	$	2,538		$	2,442		$	4,834		$	4,883
Less: Discontinued operations	97			306			351			613
Net periodic expense - Continuing operations	$	2,441		$	2,136		$	4,483		$	4,270

Post-Retirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost	$	7		$	8		$	15		$	17
Interest cost	72			73			145			146
Amortization:
Prior service cost	4			2			7			4
Recognized actuarial gain	(7		)	(40		)	(15		)	(80		)
Net periodic expense	$	76		$	43		$	152		$	87