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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Summary of Warranty Expense and Write-Off Activity | A summary of warranty expense and write-off activity for the years ended December 31, 2017, 2016 and 2015 is as follows:
Year Ended December 31, |  | 2017 |  |  | 2016 |  |  | 2015 |
(In thousands) |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 8,548 |  |  | $ | 8,739 |  |  | $ | 8,415 |
Plus: Amounts charged to cost and expenses |  |  | 6,951 |  |  |  | 8,561 |  |  |  | 2,998 |
Less: Deductions |  |  | (5,775 | ) |  |  | (8,752 | ) |  |  | (2,674 | )
Balance at end of period |  | $ | 9,724 |  |  | $ | 8,548 |  |  | $ | 8,739 |
Changes in Accumulated Other Comprehensive Income, Net of Tax by Component | The following table presents changes in accumulated other comprehensive income, net of tax, by component for the years ended December 31, 2015, 2016 and 2017:
(In thousands) |  | Unrealized Gains (Losses) on Available- for-Sale Securities |  |  | Unrealized Gains (Losses) on Cash Flow Hedges |  |  | Defined Benefit Plan Adjustments |  |  | Foreign Currency Adjustments |  |  | Total |
Balance, December 31, 2014 |  | $ | 8,964 |  |  | $ | — |  |  | $ | (5,757 | ) |  | $ | (3,282 | ) |  | $ | (75 | )
Other comprehensive income (loss) before reclassifications |  |  | (844 | ) |  |  | — |  |  |  | 1,589 |  |  |  | (3,724 | ) |  |  | (2,979 | )
Amounts reclassified from accumulated other comprehensive income |  |  | (6,188 | ) |  |  | — |  |  |  | 273 |  |  |  | — |  |  |  | (5,915 | )
Balance, December 31, 2015 |  |  | 1,932 |  |  |  | — |  |  |  | (3,895 | ) |  |  | (7,006 | ) |  |  | (8,969 | )
Other comprehensive income (loss) before reclassifications |  |  | 1,515 |  |  |  | — |  |  |  | (1,229 | ) |  |  | (569 | ) |  |  | (283 | )
Amounts reclassified from accumulated other comprehensive income |  |  | (3,043 | ) |  |  | — |  |  |  | 107 |  |  |  | — |  |  |  | (2,936 | )
Balance, December 31, 2016 |  |  | 404 |  |  |  | — |  |  |  | (5,017 | ) |  |  | (7,575 | ) |  |  | (12,188 | )
Other comprehensive income (loss) before reclassifications |  |  | 5,020 |  |  |  | (619 | ) |  |  | 451 |  |  |  | 5,999 |  |  |  | 10,851 |
Amounts reclassified from accumulated other comprehensive income |  |  | (2,857 | ) |  |  | 619 |  |  |  | 280 |  |  |  | — |  |  |  | (1,958 | )
Balance at December 31, 2017 |  | $ | 2,567 |  |  | $ | — |  |  | $ | (4,286 | ) |  | $ | (1,576 | ) |  | $ | (3,295 | )
Reclassifications Out of Accumulated Other Comprehensive Income | The following tables present the details of reclassifications out of accumulated other comprehensive income for the years ended December 31, 2017, 2016 and 2015:
(In thousands) |  | 2017
Details about Accumulated Other Comprehensive Income Components |  | Amount Reclassified from Accumulated Other Comprehensive Income |  |  | Affected Line Item in the Statement Where Net Income Is Presented
Unrealized gains (losses) on available-for-sale securities: |  |  |  |  |  |
Net realized gain on sales of securities |  | $ | 4,864 |  |  | Net realized investment gain
Impairment expense |  |  | (180 | ) |  | Net realized investment gain
Net losses on derivatives designated as hedging instruments |  |  | (897 | ) |  | Cost of sales
Defined benefit plan adjustments – actuarial losses |  |  | (406 | ) |  | (1)
Total reclassifications for the period, before tax |  |  | 3,381 |  |  |
Tax (expense) benefit |  |  | (1,423 | ) |  |
Total reclassifications for the period, net of tax |  | $ | 1,958 |  |  |
(1) | Included in the computation of net periodic pension cost. See Note 12 of Notes to Consolidated Financial Statements.
(In thousands) |  | 2016
Details about Accumulated Other Comprehensive Income Components |  | Amount Reclassified from Accumulated Other Comprehensive Income |  |  | Affected Line Item in the Statement Where Net Income Is Presented
Unrealized gains (losses) on available-for-sale securities: |  |  |  |  |  |
Net realized gain on sales of securities |  | $ | 5,408 |  |  | Net realized investment gain
Impairment expense |  |  | (419 | ) |  | Net realized investment gain
Defined benefit plan adjustments – actuarial losses |  |  | (156 | ) |  | (1)
Total reclassifications for the period, before tax |  |  | 4,833 |  |  |
Tax (expense) benefit |  |  | (1,897 | ) |  |
Total reclassifications for the period, net of tax |  | $ | 2,936 |  |  |
(1) | Included in the computation of net periodic pension cost. See Note 12 of Notes to Consolidated Financial Statements.
(In thousands) |  | 2015
Details about Accumulated Other Comprehensive Income Components |  | Amount Reclassified from Accumulated Other Comprehensive Income |  |  | Affected Line Item in the Statement Where Net Income Is Presented
Unrealized gains (losses) on available-for-sale securities: |  |  |  |  |  |
Net realized gain on sales of securities |  | $ | 10,348 |  |  | Net realized investment gain
Impairment expense |  |  | (203 | ) |  | Net realized investment gain
Defined benefit plan adjustments – actuarial losses |  |  | (396 | ) |  | (1)
Total reclassifications for the period, before tax |  |  | 9,749 |  |  |
Tax (expense) benefit |  |  | (3,834 | ) |  |
Total reclassifications for the period, net of tax |  | $ | 5,915 |  |  |
(1) | Included in the computation of net periodic pension cost. See Note 12 of Notes to Consolidated Financial Statements.
Other Comprehensive Income | The following tables present the tax effects related to the change in each component of other comprehensive income for the years ended December 31, 2017, 2016 and 2015:
|  | 2017 |
(In thousands) |  | Before-Tax Amount |  |  | Tax (Expense) Benefit |  |  | Net-of-Tax Amount |
Unrealized gains (losses) on available-for-sale securities |  | $ | 8,230 |  |  | $ | (3,210 | ) |  | $ | 5,020 |
Reclassification adjustment for amounts related to available-for-sale investments included in net income |  |  | (4,684 | ) |  |  | 1,827 |  |  |  | (2,857 | )
Unrealized gains (losses) on cash flow hedges |  |  | (897 | ) |  |  | 278 |  |  |  | (619 | )
Reclassification adjustment for amounts related to cash flow hedges included in net income |  |  | 897 |  |  |  | (278 | ) |  |  | 619 |
Defined benefit plan adjustments |  |  | 654 |  |  |  | (203 | ) |  |  | 451 |
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income |  |  | 406 |  |  |  | (126 | ) |  |  | 280 |
Foreign currency translation adjustment |  |  | 5,999 |  |  |  | — |  |  |  | 5,999 |
Total Other Comprehensive Income (Loss) |  | $ | 10,605 |  |  | $ | (1,712 | ) |  | $ | 8,893 |
|  | 2016 |
(In thousands) |  | Before-Tax Amount |  |  | Tax (Expense) Benefit |  |  | Net-of-Tax Amount |
Unrealized gains (losses) on available-for-sale securities |  | $ | 2,484 |  |  | $ | (969 | ) |  | $ | 1,515 |
Reclassification adjustment for amounts related to available-for-sale investments included in net income |  |  | (4,989 | ) |  |  | 1,946 |  |  |  | (3,043 | )
Defined benefit plan adjustments |  |  | (1,782 | ) |  |  | 553 |  |  |  | (1,229 | )
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income |  |  | 156 |  |  |  | (49 | ) |  |  | 107 |
Foreign currency translation adjustment |  |  | (569 | ) |  |  | — |  |  |  | (569 | )
Total Other Comprehensive Income (Loss) |  | $ | (4,700 | ) |  | $ | 1,481 |  |  | $ | (3,219 | )
|  | 2015 |
(In thousands) |  | Before-Tax Amount |  |  | Tax (Expense) Benefit |  |  | Net-of-Tax Amount |
Unrealized gains (losses) on available-for-sale securities |  | $ | (1,384 | ) |  | $ | 540 |  |  | $ | (844 | )
Reclassification adjustment for amounts related to available-for-sale investments included in net income |  |  | (10,145 | ) |  |  | 3,957 |  |  |  | (6,188 | )
Defined benefit plan adjustments |  |  | 2,303 |  |  |  | (714 | ) |  |  | 1,589 |
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income |  |  | 396 |  |  |  | (123 | ) |  |  | 273 |
Foreign currency translation adjustment |  |  | (3,724 | ) |  |  | — |  |  |  | (3,724 | )
Total Other Comprehensive Income (Loss) |  | $ | (12,554 | ) |  | $ | 3,660 |  |  | $ | (8,894 | )
Cash Dividends | The following table shows dividends paid to our shareholders in each quarter of 2017, 2016 and 2015.
Dividends per Common Share |
|  | 2017 |  |  | 2016 |  |  | 2015 |
First Quarter |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.09 |
Second Quarter |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.09 |
Third Quarter |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.09 |
Fourth Quarter |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.09 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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