The expected future life expectancy of qualified pension plans.

No definition available.

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- Definition

The loss reported during the period for the termination of pension plan.

+ References

No definition available.

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- Definition

Noncontributory pension benefit plans for employees.

+ References

No definition available.

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- Definition

Month-end measurement date applicable when an accounting policy election is made to measure plan assets and benefit obligations as of the month-end that is closest to the fiscal year-end, in CCYY-MM-DD format.

+ References

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- Definition

Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees.

+ References

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- Definition

Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

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- Definition

Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

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- Definition

Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

+ References

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- Definition

Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.

+ 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 (d)(5)(ii)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-Publisher FASB
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- References

No definition available.

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- Definition

Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Paragraph 15
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Retirement Plans - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retirement Plans
Noncontributory benefit pension plans covering active employees	5.00%
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 23,900,000
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	23,912,000.0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	$ 13,476,000.0
Loss on termination of pension plan			$ 8,280,000
Amortization period	18 years
Amortization of retirement benefits, net of tax	$ 5,888,000
Defined Benefit Plan, Accounting Policy Election, Measurement Date	Dec. 31, 2017
Post-Retirement Life Insurance Plan
Retirement Plans
Amortization period	3 years
Domestic Plan [Member]
Retirement Plans
Settlement loss	$ 13,476,000	$ 0	0
Expected contribution to be made by CTS	101,000
Foreign Plan [Member]
Retirement Plans
Settlement loss	0	$ 0	$ 0
Expected contribution to be made by CTS	$ 331,000