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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2014
Income Taxes [Abstract] |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2014 |  | 2013
Deferred tax liabilities: |  |  |  |
Goodwill and other intangibles | $ | (10,800) | $ | (11,360)
Depreciation |  | (3,763) |  | (3,369)
Inventories |  | (3,188) |  | (3,611)
Investment in LB Pipe joint venture |  | (553) |  | (587)
Other |  | (527) |  | (437)
Total deferred tax liabilities |  | (18,831) |  | (19,364)
Deferred tax assets: |  |  |  |
Pension and post-retirement liability |  | 2,147 |  | 1,033
Warranty reserve |  | 4,180 |  | 2,689
Deferred compensation |  | 1,755 |  | 1,525
Accounts receivable |  | 369 |  | 388
Contingent liabilities |  | 667 |  | 662
Long-term insurance reserves |  | 660 |  | 569
Net operating loss / tax credit carryforwards |  | 883 |  | 139
Other |  | 645 |  | 843
Total deferred tax assets |  | 11,306 |  | 7,848
Net deferred tax liability | $ | (7,525) | $ | (11,516)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2014 |  | 2013 |  | 2012
Current: |  |  |  |  |  |
Federal | $ | 11,486 | $ | 8,776 | $ | 9,742
State |  | 1,491 |  | 837 |  | 1,977
Foreign |  | 3,339 |  | 1,982 |  | 1,910
Total current |  | 16,316 |  | 11,595 |  | 13,629
Deferred: |  |  |  |  |  |
Federal |  | (2,321) |  | 3,200 |  | (3,966)
State |  | (122) |  | 273 |  | (155)
Foreign |  | (471) |  | (229) |  | (442)
Total deferred |  | (2,914) |  | 3,244 |  | (4,563)
Total income tax expense from continuing operations | $ | 13,402 | $ | 14,839 | $ | 9,066
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | 2014 |  | 2013 |  | 2012
Domestic | $ | 30,762 | $ | 37,283 | $ | 16,600
Foreign |  | 8,294 |  | 6,832 |  | 7,230
Income from continuing operations, before income taxes | $ | 39,056 | $ | 44,115 | $ | 23,830
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
| 2014 |  | 2013 |  | 2012 |
Statutory rate | 35.0 | % | 35.0 | % | 35.0 | %
Foreign tax rate differential | (2.2) |  | (1.7) |  | (3.0) |
State income taxes, net of federal benefit | 2.7 |  | 2.6 |  | 4.5 |
Non-deductible expenses | 1.8 |  | 0.6 |  | 1.4 |
Tax credits | (0.9) |  | (0.8) |  | (2.2) |
Change in liability for unrecognized tax benefits | (0.8) |  | (1.9) |  | 0.9 |
Domestic production activities deduction | (2.2) |  | (1.2) |  | (1.2) |
Other | 0.9 |  | 1.0 |  | 2.6 |
| 34.3 | % | 33.6 | % | 38.0 | %
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | 2014 |  | 2013
Unrecognized tax benefits at beginning of period: | $ | 1,509 | $ | 2,045
Increases based on tax positions for prior periods |  | 18 |  | 149
Decreases based on tax positions for prior periods |  | (325) |  | (89)
Decreases related to settlements with taxing authorities |  | (126) |  | (596)
Decreases as a result of a lapse of the applicable statute of limitations |  | (63) |  | -
Balance at end of period | $ | 1,013 | $ | 1,509

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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