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Retirement Benefits (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2015 | Mar. 31, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Sep. 30, 2017
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  |  | $ 13,999 |  | $ 12,574 |  |  |
Treasury Stock Issued During Period, Shares, Employee Benefit Plans |  |  | 317 |  | 259 |  |  |
Pension Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Net periodic retirement pension (benefit) cost |  | $ (390) |  | $ (458) |  | $ (923) | $ (1,368) |
United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |  |  |  |  |  |
Net periodic retirement pension (benefit) cost |  | (383) |  | (474) |  | (898) | (1,421) |
Foreign Pension Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Net periodic retirement pension (benefit) cost |  | (7) |  | 16 |  | (25) | 53 |
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Net periodic retirement pension (benefit) cost |  | 267 |  | $ 257 |  | 801 | 774 |
Scenario, Forecast [Member] | United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |  |  |  |  |  |
Benefits paid | $ 7,000 |  |  |  |  |  |  | $ 7,000
Business Acquisition, Acquiree - Duarte Business [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Net periodic retirement pension (benefit) cost | 63 |  |  |  |  |  |  |
Current defined benefit pension plan liability |  | $ 200 |  |  |  | 200 |  |
Business Acquisition, Acquiree - Duarte Business [Member] | Minimum [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Settlement costs | 100 |  |  |  |  |  |  |
Business Acquisition, Acquiree - Duarte Business [Member] | Maximum [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |  |  |
Settlement costs | $ 200 |  |  |  |  |  |  |
Total stockholders equity |  |  |  |  |  |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  |  |  |  |  | 13,999 | 12,574 |
Treasury Stock at Cost [Member] |  |  |  |  |  |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  |  |  |  |  | $ 8,680 | $ 8,084 |
Treasury Stock Issued During Period, Shares, Employee Benefit Plans |  |  |  |  |  | 317 | 259 |

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- Definition This represents the entire liability recognized in the balance sheet that is associated with the defined benefit pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 + Details
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- Definition The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Benefits -URI http://asc.fasb.org/extlink&oid=49170737 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Postretirement Benefits -URI http://asc.fasb.org/extlink&oid=6521376 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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