Represents the interest rate earned under the deferred compensation arrangement with individuals.

No definition available.

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- Definition

The percentage points added to the reference rate to compute the variable interest rate for actively employed participants under the deferred compensation arrangement with individuals.

+ References

No definition available.

+ Details

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- Definition

Represents the reference rate for the variable rate of the participant deferrals, such as LIBOR or the U.S. Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Represents the interest rate earned for retired participants under the deferred compensation arrangement with individuals.

+ References

No definition available.

+ Details

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- Definition

Defined Benefit Plan, Settlements, Benefit Obligation, Percentage

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

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- Definition

Net increase or decrease in the plan benefit obligation during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss related to net period benefit cost (credit) for pension and other postretirement defined benefit plans.

+ References

No definition available.

+ Details

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Employee Benefit Plans Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 01, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Expense recognized related to qualified defined contribution benefit plan		$ 12,364	$ 13,016	$ 8,479
Supplemental Executive Retirement Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Settlement of Supplemental Executive Retirement Plan (as a percent)					21.00%
Reclassification loss adjustment from AOCI before Tax	$ 1,857
Payments to medical and retirement plans		3,435
Post-Retirement Medical Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Payments to medical and retirement plans		856
Other noncurrent liabilities with offset to goodwill \| Supplemental Executive Retirement Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Prior services costs		3,911
Key executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Participant balances, reflected in other liabilities		$ 7,236	$ 8,678
Participant deferrals average interest rate (as a percent)		6.42%	6.48%
Reference rate		Moody’s Average Annual Corporate Bond Index rate
Fixed rates for retired participants (as a percent)		0.45%
Select group of management and highly compensated individuals
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Participant balances, reflected in other liabilities		$ 21,758	$ 18,654
Minimum \| Key executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Fixed rates for retired participants (as a percent)		4.12%
Maximum \| Key executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Fixed rates for retired participants (as a percent)		5.03%