Employee Retirement and Profit Sharing Plans - Reconciliation of Change in Fair Value Measurement of Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Change in plan assets:
Fair value of plan assets at beginning of year	$ 344,760
Fair value of plan assets at end of year	299,208	$ 344,760
Diversified Funds
Change in plan assets:
Fair value of plan assets at beginning of year	2,700
Fair value of plan assets at end of year	2,712	2,700
Level 3
Change in plan assets:
Fair value of plan assets at beginning of year	2,700	4,093
Relating to instruments still held at reporting date	76	97
Relating to instruments sold during the period		(1)
Purchases, sales and settlements (net)	(1,360)	(1,849)
Transfers in and/or out of Level 3	1,296	360
Fair value of plan assets at end of year	2,712	2,700
Level 3 \| Diversified Funds
Change in plan assets:
Fair value of plan assets at beginning of year	2,700	3,930
Relating to instruments still held at reporting date	76	97
Relating to instruments sold during the period		0
Purchases, sales and settlements (net)	(1,360)	(1,849)
Transfers in and/or out of Level 3	1,296	522
Fair value of plan assets at end of year	2,712	2,700
Level 3 \| Partnerships/ Joint Ventures
Change in plan assets:
Fair value of plan assets at beginning of year	0	163
Relating to instruments still held at reporting date	0	0
Relating to instruments sold during the period		(1)
Purchases, sales and settlements (net)	0	0
Transfers in and/or out of Level 3	0	(162)
Fair value of plan assets at end of year	$ 0	$ 0

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold.

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

+ References

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(01)
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(ii)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

+ Details

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

+ Details

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- Details

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- Details

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- Details

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