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Summary of Signficant Accounting Policies (Details Textual 1) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Business Acquisition [Line Items] |  |  |  |
Conditions for Investments in Entities Accounted for Equity Basis |  | 0.50 |  |
Goodwill |  | $ 301,367 | $ 298,487 | $ 417,389
Goodwill, Written off Related to Sale of Business Unit |  |  | (7,536) |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 129,981 | 114,093 |
Intangible Assets, Gross (Excluding Goodwill) |  | 320,508 | 321,301 |
Goodwill, Impairment Loss |  | $ 0 |  |
Conditions for Investments in Entities Accounted for on Cost Basis |  | 0.50 |  |
Contractual Rights [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 7,064 | 7,152 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 7,014 | 6,886 |
Finite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 500 |
Contractual Rights [Member] | Maximum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |
Contractual Rights [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 3 years |  |
Technology-Based and other [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 46,461 | 47,323 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 29,061 | 27,011 |
Finite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 800 |
Technology-Based and other [Member] | Maximum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 20 years |  |
Technology-Based and other [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 4 years |  |
Customer-related [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 205,502 | 205,471 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 74,669 | 66,938 |
Finite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 30,000 |
Customer-related [Member] | Maximum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 21 years |  |
Customer-related [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |  |
Unpatented Technology [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 31,754 | 31,837 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 10,589 | 4,614 |
Finite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 15,400 |
Unpatented Technology [Member] | Maximum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 30 years |  |
Unpatented Technology [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |  |
Trademarks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 12,401 | 12,668 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 8,648 | 8,644 |
Finite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 1,100 |
Trademarks [Member] | Maximum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 20 years |  |
Trademarks [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 5 years |  |
Trademarks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill) |  | $ 17,326 | 16,850 |
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit |  |  | 5,000 |
Infrastructure [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 0 | 0 | 112,860
Goodwill, Written off Related to Sale of Business Unit |  |  | (6,461) |
Goodwill and Intangible Asset Impairment | $ 106,100 |  |  |
Goodwill, Impairment Loss | 105,700 |  | (105,711) |
Infrastructure [Member] | Contractual Rights [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible Asset Write-Down |  |  |  | 10,500
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  | 5,500
Reduction of Liability |  |  |  | 5,000
Infrastructure [Member] | Trademarks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) | 400 |  |  |
Industrial [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 273,490 | 271,501 | $ 277,094
Goodwill, Written off Related to Sale of Business Unit |  |  | $ (1,075) |
Industrial [Member] | Trademarks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) | $ 2,300 |  |  |

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