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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract] |  |
Schedule of Costs of Retirement Plans | Net periodic pension and postretirement benefit expense (income) recorded in the Company's statement of operations for defined benefit pension plans and postretirement benefit plans include the following components:
|  | Pension Benefit |  | Postretirement Benefit
|  | 2015 |  | 2014 |  | 2013 |  | 2015 |  | 2014 |  | 2013
|  | (dollars in thousands)
Service cost |  | $ | 890 |  |  | $ | 760 |  |  | $ | 680 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost |  | 1,580 |  |  | 1,760 |  |  | 1,610 |  |  | 20 |  |  | 30 |  |  | 40 |
Expected return on plan assets |  | (1,840 | ) |  | (2,070 | ) |  | (1,810 | ) |  | — |  |  | — |  |  | — |
Settlement/curtailment |  | 2,750 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of net (gain)/loss |  | 1,340 |  |  | 1,120 |  |  | 1,280 |  |  | (30 | ) |  | (90 | ) |  | (80 | )
Net periodic benefit expense (income) |  | $ | 4,720 |  |  | $ | 1,570 |  |  | $ | 1,760 |  |  | $ | (10 | ) |  | $ | (60 | ) |  | $ | (40 | )
Schedule of Assumptions Used | Weighted-average assumptions used in accounting for the U.S. defined benefit pension plans and postretirement benefit plans are as follows:
|  | Pension Benefit |  | Postretirement Benefit
|  | 2015 |  | 2014 |  | 2013 |  | 2015 |  | 2014 |  | 2013
Discount rate for obligations |  | 4.62 | % |  | 4.17 | % |  | 5.01 | % |  | 4.21 | % |  | 3.89 | % |  | 4.48 | %
Discount rate for benefit costs |  | 4.17 | % |  | 5.01 | % |  | 4.24 | % |  | 3.89 | % |  | 4.48 | % |  | 3.69 | %
Rate of increase in compensation levels |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
Expected long-term rate of return on plan assets |  | 7.50 | % |  | 7.50 | % |  | 7.50 | % |  | N/A |  |  | N/A |  |  | N/A |
The Company utilizes a high-quality (Aa) corporate bond yield curve as the basis for its domestic discount rate for its pension and postretirement benefit plans. Management believes this yield curve removes the impact of including additional required corporate bond yields (potentially considered in the above-median curve) resulting from the uncertain economic climate that does not necessarily reflect the general trend in high-quality interest rates. Actuarial valuations of the Company's non-U.S. defined benefit pension plans were prepared as of December 31, 2015, 2014 and 2013. Weighted-average assumptions used in accounting for the non-U.S. defined benefit pension plans are as follows:
|  | Pension Benefit
|  | 2015 |  | 2014 |  | 2013
Discount rate for obligations |  | 3.80 | % |  | 3.70 | % |  | 4.50 | %
Discount rate for benefit costs |  | 3.70 | % |  | 4.50 | % |  | 4.50 | %
Rate of increase in compensation levels |  | 3.90 | % |  | 3.80 | % |  | 4.10 | %
Expected long-term rate of return on plan assets |  | 4.90 | % |  | 5.60 | % |  | 5.40 | %
Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets |
|  | Pension Benefit |  | Postretirement Benefit
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (dollars in thousands)
Changes in Projected Benefit Obligations |  |  |  |  |  |  |  |
Benefit obligations at January 1 |  | $ | (43,730 | ) |  | $ | (38,230 | ) |  | $ | (660 | ) |  | $ | (810 | )
Service cost |  | (890 | ) |  | (760 | ) |  | — |  |  | — |
Interest cost |  | (1,580 | ) |  | (1,760 | ) |  | (20 | ) |  | (30 | )
Participant contributions |  | (60 | ) |  | (60 | ) |  | — |  |  | — |
Actuarial gain (loss) |  | (150 | ) |  | (6,470 | ) |  | 200 |  |  | 100 |
Benefit payments |  | 1,640 |  |  | 2,230 |  |  | 70 |  |  | 80 |
Settlement payments |  | 5,210 |  |  | — |  |  | — |  |  | — |
Change in foreign currency |  | 1,320 |  |  | 1,320 |  |  | — |  |  | — |
Projected benefit obligations at December 31 |  | $ | (38,240 | ) |  | $ | (43,730 | ) |  | $ | (410 | ) |  | $ | (660 | )
Changes in Plan Assets |  |  |  |  |  |  |  |
Fair value of plan assets at January 1 |  | $ | 32,610 |  |  | $ | 31,780 |  |  | $ | — |  |  | $ | — |
Actual return on plan assets |  | 50 |  |  | 1,830 |  |  | — |  |  | — |
Employer contributions |  | 3,640 |  |  | 2,340 |  |  | 70 |  |  | 80 |
Participant contributions |  | 60 |  |  | 60 |  |  | — |  |  | — |
Benefit payments |  | (1,640 | ) |  | (2,230 | ) |  | (70 | ) |  | (80 | )
Settlement payment |  | (5,210 | ) |  | — |  |  | — |  |  | — |
Change in foreign currency |  | (1,240 | ) |  | (1,170 | ) |  | — |  |  | — |
Fair value of plan assets at December 31 |  | $ | 28,270 |  |  | $ | 32,610 |  |  | $ | — |  |  | $ | — |
Funded status at December 31 |  | $ | (9,970 | ) |  | $ | (11,120 | ) |  | $ | (410 | ) |  | $ | (660 | )
Schedule of Amounts Recognized in Balance Sheet |
|  | Pension Benefit |  | Postretirement Benefit
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (dollars in thousands)
Amounts Recognized in Balance Sheet |  |  |  |  |  |  |  |
Prepaid benefit cost |  | $ | 590 |  |  | $ | 790 |  |  | $ | — |  |  | $ | — |
Current liabilities |  | (320 | ) |  | (320 | ) |  | (50 | ) |  | (70 | )
Noncurrent liabilities |  | (10,240 | ) |  | (11,590 | ) |  | (360 | ) |  | (590 | )
Net liability recognized at December 31 |  | $ | (9,970 | ) |  | $ | (11,120 | ) |  | $ | (410 | ) |  | $ | (660 | )
Schedule of Accumulated Other Comprehensive Income |
|  | Pension Benefit |  | Postretirement Benefit
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (dollars in thousands)
Amounts Recognized in Accumulated Other Comprehensive (Income) Loss |  |  |  |  |  |  |  |
Unrecognized prior-service cost |  | $ | 80 |  |  | $ | 90 |  |  | $ | — |  |  | $ | — |
Unrecognized net loss/(gain) |  | 18,570 |  |  | 21,420 |  |  | (840 | ) |  | (670 | )
Total accumulated other comprehensive (income) loss recognized at December 31 |  | $ | 18,650 |  |  | $ | 21,510 |  |  | $ | (840 | ) |  | $ | (670 | )
Changes in AOCI by component for the year ended December 31, 2015 are summarized as follows, net of tax:
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
|  | (dollars in thousands)
Balance, December 31, 2014 |  | $ | (14,180 | ) |  | $ | 610 |  |  | $ | 23,790 |  |  | $ | 10,220 |
Net unrealized losses arising during the period (a) |  | (1,320 | ) |  | (3,610 | ) |  | (12,370 | ) |  | (17,300 | )
Less: Net realized losses reclassified to net income (b) |  | (3,130 | ) |  | (960 | ) |  | — |  |  | (4,090 | )
Net current-period other comprehensive income (loss) |  | 1,810 |  |  | (2,650 | ) |  | (12,370 | ) |  | (13,210 | )
Less: Distribution of the Cequent businesses |  | — |  |  | 250 |  |  | (8,560 | ) |  | (8,310 | )
Balance, December 31, 2015 |  | $ | (12,370 | ) |  | $ | (1,790 | ) |  | $ | 2,860 |  |  | $ | (11,300 | )
__________________________ (a) Defined benefit plans, net of income tax expense of $0.4 million. See Note 16, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $1.9 million. See Note 13, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax expense of $1.8 million. See Note 16, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $0.3 million. See Note 13, "Derivative Instruments," for further details. | Changes in AOCI by component for the year ended December 31, 2014 are summarized as follows, net of tax:
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
|  | (dollars in thousands)
Balance, December 31, 2013 |  | $ | (10,840 | ) |  | $ | 1,060 |  |  | $ | 37,610 |  |  | $ | 27,830 |
Net unrealized losses arising during the period (a) |  | (4,040 | ) |  | (900 | ) |  | (15,090 | ) |  | (20,030 | )
Less: Net realized losses reclassified to net income (b) |  | (700 | ) |  | (450 | ) |  | (1,270 | ) |  | (2,420 | )
Net current-period other comprehensive loss |  | (3,340 | ) |  | (450 | ) |  | (13,820 | ) |  | (17,610 | )
Balance, December 31, 2014 |  | $ | (14,180 | ) |  | $ | 610 |  |  | $ | 23,790 |  |  | $ | 10,220 |
__________________________ (a) Defined benefit plans, net of income tax expense of $2.0 million. See Note 16, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $0.6 million. See Note 13, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax expense of $0.3 million. See Note 16, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $0.3 million. See Note 13, "Derivative Instruments," for further details.
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets |
|  | Accumulated Benefit Obligations |  | Projected Benefit Obligations
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (dollars in thousands)
Benefit Obligations at December 31, |  |  |  |  |  |  |  |
Total benefit obligations |  | $ | (35,890 | ) |  | $ | (41,450 | ) |  | $ | (38,240 | ) |  | $ | (43,730 | )
Plans with benefit obligations exceeding plan assets |  |  |  |  |  |  |  |
Benefit obligations |  | $ | (17,940 | ) |  | $ | (40,630 | ) |  | $ | (37,560 | ) |  | $ | (42,910 | )
Plan assets |  | 9,200 |  |  | 31,000 |  |  | 27,000 |  |  | 31,000 |
Schedule of Effect of Change in Discount Rate and Expected Return on Assets on Benefit Obligations and Expense |
|  | December 31, 2015 Benefit Obligation |  | 2015 Expense
|  | Pension |  | Postretirement Benefit |  | Pension |  | Postretirement Benefit
|  | (dollars in thousands)
Discount rate |  |  |  |  |  |  |  |
25 basis point increase |  | $ | (1,370 | ) |  | $ | (10 | ) |  | $ | (90 | ) |  | $ | — |
25 basis point decrease |  | $ | 1,420 |  |  | $ | 10 |  |  | $ | 100 |  |  | — |
Expected return on assets |  |  |  |  |  |  |  |
50 basis point increase |  | N/A |  |  | N/A |  |  | $ | (150 | ) |  | N/A |
50 basis point decrease |  | N/A |  |  | N/A |  |  | $ | 150 |  |  | N/A |
Schedule of Allocation of Plan Assets | The actual weighted average asset allocation of the Company's domestic and foreign pension plans' assets at December 31, 2015 and 2014 and target allocations by class, were as follows:
|  | Domestic Pension |  | Foreign Pension
|  |  |  | Actual |  |  |  | Actual
|  | Target |  | 2015 |  | 2014 |  | Target |  | 2015 |  | 2014
Equity securities |  | 50%-70% |  |  | 62 | % |  | 63 | % |  | 55 | % |  | 40 | % |  | 52 | %
Fixed income securities |  | 30%-50% |  |  | 36 | % |  | 35 | % |  | 45 | % |  | 46 | % |  | 48 | %
Cash and cash equivalents |  | — |  |  | 2 | % |  | 2 | % |  | — |  |  | 14 | % |  | — | %
Total |  | 100 | % |  | 100 | % |  | 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
Fair Value, Assets Measured on Recurring Basis [Table Text Block] | The following table summarizes the level under the fair value hierarchy (see Note 3, "Summary of Significant Accounting Policies") that the Company's pension plan assets are measured on a recurring basis as of December 31, 2015:
|  | Total |  | Level 1 |  | Level 2 |  | Level 3
Equity Securities |  |  |  |  |  |  |  |
Investment funds |  | $ | 13,980 |  |  | $ | — |  |  | $ | 13,980 |  |  | $ | — |
Fixed Income Securities |  |  |  |  |  |  |  |
Investment funds |  | 7,920 |  |  | — |  |  | 7,920 |  |  | — |
Corporate bonds |  | 3,540 |  |  | — |  |  | 3,540 |  |  | — |
Other (a) |  | 110 |  |  | — |  |  | 110 |  |  | — |
Cash and cash equivalents |  |  |  |  |  |  |  |
Short term investment funds |  | 2,720 |  |  | 2,550 |  |  | 170 |  |  | — |
Total |  | $ | 28,270 |  |  | $ | 2,550 |  |  | $ | 25,720 |  |  | $ | — |
________________________________________ (a) Comprised of mortgage-backed, asset backed securities |
Schedule of Expected Benefit Payments | The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:
|  | Pension Benefit |  | Postretirement Benefit
|  | (dollars in thousands)
December 31, 2016 |  | $ | 1,490 |  |  | $ | 50 |
December 31, 2017 |  | 1,510 |  |  | 40 |
December 31, 2018 |  | 1,580 |  |  | 40 |
December 31, 2019 |  | 1,640 |  |  | 40 |
December 31, 2020 |  | 1,680 |  |  | 30 |
Years 2021-2025 |  | 9,420 |  |  | 130 |
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates | A one-percentage point change in the assumed health care cost trend would have the following effects:
|  | One Percentage-Point Increase |  | One Percentage-Point Decrease
|  | (dollars in thousands)
Effect on total service and interest cost |  | $ | — |  |  | $ | — |
Effect on postretirement benefit obligation |  | 30 |  |  | (30 | )

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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