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Accumulated Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |  |  |
Balance, Beginning of Period |  | $ 635,786 |  |  |  |  |
Other comprehensive income (loss) before reclassifications |  | 4,024 |  | $ 10,930 |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 30 |  | 37 |  |  |
Other comprehensive income (loss) |  | 4,054 |  | 10,967 |  |  |
Balance, End of Period |  | 679,239 |  |  |  |  |
AOCI, Pension and other postretirement benefit plans, tax |  | 9,144 |  | 9,860 |  | $ 9,160 | $ 9,879
AOCI, Cumulative changes in net gain (loss) from cash flow hedges, tax |  | 65 |  | 3 |  | $ 0 | $ 5
Foreign currency translation adjustments |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |  |  |
Balance, Beginning of Period |  | (46,446) |  | (41,365) |  |  |
Other comprehensive income (loss) before reclassifications |  | 4,138 |  | 10,926 |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0 | [1] | 0 | [2] |  |
Other comprehensive income (loss) |  | 4,138 |  | 10,926 |  |  |
Balance, End of Period |  | (42,308) |  | (30,439) |  |  |
Funded status of pension plans and other postretirement benefits |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |  |  |
Balance, Beginning of Period | [3] | (45,816) |  | (47,082) |  |  |
Other comprehensive income (loss) before reclassifications | [3] | 0 |  | 0 |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 30 |  | 35 | [2],[3] |  |
Other comprehensive income (loss) |  | 30 |  | 35 |  |  |
Balance, End of Period |  | (45,786) |  | (47,047) | [3] |  |
Reclassification from AOCI, Current Period, Tax |  | 19 |  | 14 |  |  |
Unrealized gain (loss) on derivative instruments |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |  |  |
Balance, Beginning of Period | [4] | 0 |  | (11) |  |  |
Other comprehensive income (loss) before reclassifications |  | (114) |  | 4 | [4] |  |
Amounts reclassified from accumulated other comprehensive income (loss) | [4] | 0 | [1] | 2 | [2] |  |
Other comprehensive income (loss) |  | (114) |  | 6 |  |  |
Balance, End of Period |  | (114) |  | (5) | [4] |  |
Reclassification from AOCI, Current Period, Tax |  | 1 |  |  |  |  |
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |  |  |
Balance, Beginning of Period |  | (92,262) |  | (88,458) |  |  |
Other comprehensive income (loss) |  | 4,054 |  |  |  |  |
Balance, End of Period |  | $ (88,208) |  | $ (77,491) |  |  |
[1] | Net of taxes of $14 for the pension plans and postretirement benefits
[2] | Net of taxes of $19 and $1 for the pension plans and postretirement benefits and unrealized gain (loss) on derivatives, respectively.
[3] | Net of taxes of $9,144 and $9,160 as of March 31, 2017 and December 31, 2016, respectively. Net of taxes of $9,860 and $9,879 as of March 31, 2016 and December 31, 2015, respectively.
[4] | Net of taxes of $65 and $0 as of March 31, 2017 and December 31, 2016, respectively. Net of taxes of $3 and $5 as of March 31, 2016 and December 31, 2015, respectively.

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- Definition Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax + References No definition available. + Details
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- Definition Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax + References No definition available. + Details
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- Definition Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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