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Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balances | $ 697,480 |  | $ 620,450 |
Total other comprehensive income (loss) | (3,680) |  | 3,020 |
Balances | 675,460 |  | 640,510 |
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (1,500) |  | 700 |
Defined Benefit Plans [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balances | (9,930) |  | (7,200) |
Net unrealized gains (losses) arising during the period | 0 |  | 0 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | (150) |  | (100) |
Total other comprehensive income (loss) | 150 |  | 100 |
Reclassification of stranded tax effects |  |  | (1,260) |
Balances | (9,780) |  | (8,360) |
Accumulated Net Gain (Loss) from Hedges Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balances | 4,230 |  | 940 |
Net unrealized gains (losses) arising during the period | 4,430 | [1] | 2,220 | [2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 |  | 0 |
Total other comprehensive income (loss) | 4,430 |  | 2,220 |
Reclassification of stranded tax effects |  |  | (10) |
Balances | 8,660 |  | 3,150 |
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balances | (300) |  | (10,590) |
Net unrealized gains (losses) arising during the period | (8,260) |  | 700 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 |  | 0 |
Total other comprehensive income (loss) | (8,260) |  | 700 |
Reclassification of stranded tax effects |  |  | 0 |
Balances | (8,560) |  | (9,890) |
Accumulated Other Comprehensive Income [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balances | (6,000) |  | (16,850) |
Net unrealized gains (losses) arising during the period | (3,830) |  | 2,920 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | (150) |  | (100) |
Total other comprehensive income (loss) | (3,680) |  | 3,020 |
Reclassification of stranded tax effects |  |  | (1,270) |
Balances | $ (9,680) |  | $ (15,100) |
[1] | Derivative instruments, net of income tax of approximately $1.5 million. See Note 10, "Derivative Instruments," for further details.
[2] | Derivative instruments, net of income tax of approximately $0.7 million. See Note 10, "Derivative Instruments," for further details.

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581 + Details
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