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Benefit Plans Benefit Plans (Detail 10) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | $ 750,630 |
Foreign Currency Exchange Rate Changes, Plan Assets | (26,946) | $ (9,323)
Fair Value of Plan Assets, Ending | 738,167 | 750,630
Level 3 |  |
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | 34,872 | 29,584
Defined Benefit Plan, Actual Return on Plan Assets Still Held | 25 | 2,430
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period | (2,857) |
Defined Benefit Plan,Purchases, Total |  | 3,010
Defined Benefit Plan Sales, Total | (21,316) |
Foreign Currency Exchange Rate Changes, Plan Assets | (3,830) | (152)
Fair Value of Plan Assets, Ending | 6,894 | 34,872
Real Asset Mutual Funds, Commodities |  |
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | 58,477 |
Fair Value of Plan Assets, Ending | 28,558 | 58,477
Real Asset Mutual Funds, Commodities | Level 3 |  |
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | 33,505 | 28,196
Defined Benefit Plan, Actual Return on Plan Assets Still Held | 0 | 2,408
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period | (2,857) |
Defined Benefit Plan,Purchases, Total |  | 2,911
Defined Benefit Plan Sales, Total | (21,278) |
Foreign Currency Exchange Rate Changes, Plan Assets | (3,776) | (10)
Fair Value of Plan Assets, Ending | 5,594 | 33,505
Fixed Income Mutual Funds, Insurance Contracts |  |
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | 21,718 |
Fair Value of Plan Assets, Ending | 21,255 | 21,718
Fixed Income Mutual Funds, Insurance Contracts | Level 3 |  |
Rollforward of Activity for Level 3 Asset Categories [Roll Forward] |  |
Fair Value of Plan Assets, Beginning | 1,367 | 1,388
Defined Benefit Plan, Actual Return on Plan Assets Still Held | 25 | 22
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period | 0 |
Defined Benefit Plan,Purchases, Total |  | 99
Defined Benefit Plan Sales, Total | (38) |
Foreign Currency Exchange Rate Changes, Plan Assets | (54) | (142)
Fair Value of Plan Assets, Ending | $ 1,300 | $ 1,367

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- Definition Actual return on plan assets, separately identifying the amount related to assets sold during the 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 (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=65897934&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 5 -Subparagraph (c)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920 + Details
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- Definition Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date. + 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)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=65897934&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 5 -Subparagraph (c)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920 + Details
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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6749337 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6520858 + Details
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- Definition The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency. + 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 (b)(2) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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