INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of income before income tax expense

Income before income tax expense consists of the following (in thousands):

	2017		2016		2015
U.S. operations	$	62,609	$	107,803	$	77,996
Foreign operations	15,983		19,735		25,423
Total	$	78,592	$	127,538	$	103,419

Schedule of income tax expense

Income tax (benefit) expense is comprised of the following (in thousands):

	2017			2016			2015
Current:
Federal	$	11,712		$	11,980		$	24,988
State	2,404			2,840			6,101
Foreign	3,918			4,588			6,224
Total current	18,034			19,408			37,313
Deferred:
Federal	(20,595		)	23,814			(1,098		)
State	2,541			2,347			505
Foreign	(1,580		)	(145		)	751
Total deferred	(19,634		)	26,016			158
Income tax (benefit) expense	$	(1,600	)	$	45,424		$	37,471

Schedule of tax effects of temporary differences that give rise to the deferred tax assets and liabilities

The following table sets forth the tax effects of temporary differences that give rise to the deferred tax assets and liabilities (in thousands):

	December 31, 2017			December 31, 2016
Deferred tax assets
Accounts receivable, principally due to allowance for doubtful accounts	$	858		$	2,985
Inventories	5,939			8,294
Net operating loss carryforwards	7,460			6,664
Accrued pension	5,591			7,637
Stock-based compensation	2,972			6,493
Compensation-related accruals	3,063			4,928
Warranty	1,779			3,222
Obligation for post-employment benefits other than pension	1,312			2,267
Accrued liabilities and other items	3,886			8,537
Gross deferred tax assets	32,860			51,027
Valuation allowance	(4,789		)	(6,161		)
Net deferred tax assets	28,071			44,866
Deferred tax liabilities:
Intangibles	(58,701		)	(86,961		)
Plant and equipment	(24,041		)	(34,759		)
Gross deferred tax liabilities	(82,742		)	(121,720		)
Net deferred tax liabilities	$	(54,671	)	$	(76,854	)

Schedule of reconciliation of statutory federal income tax rate to the effective income tax rate

The following table sets forth a reconciliation of the statutory federal income tax rate to the effective income tax rate:

	2017		2016		2015
Federal statutory tax rate	35.0	%	35.0	%	35.0	%
Increase (decrease) in the tax rate resulting from:
State taxes, net of federal effect	5.2	%	3.3	%	4.4	%
Effect of tax rates of other countries	(1.8	)%	(1.4	)%	(2.4	)%
Section 199 deduction	(0.7	)%	(0.8	)%	(0.9	)%
Change in contingency reserve	—	%	(0.2	)%	(0.2	)%
Limitation on deduction of officer’s compensation	1.3	%	0.6	%	0.5	%
Tax Act	(33.9	)%	—	%	—	%
Valuation Allowance Release	(3.3	)%	—	%	—	%
Other	(3.8	)%	(0.9	)%	(0.2	)%
Effective tax rate	(2.0	)%	35.6	%	36.2	%

Summarizes the activity related to the entity's unrecognized tax benefits

The following table summarizes the activity related to the Company's unrecognized tax benefits during 2017, 2016, and 2015 (in thousands):

	2017			2016			2015
Balance, beginning of the year	$	875		$	4,407		$	4,922
Additions for tax position related to the current year	125			125			125
Additions for tax position related to the prior year	—			56			134
Decreases for tax position related to the prior year	—			(250		)	(774		)
Prior year reductions:
Lapse of statute of limitations	(125		)	(125		)	—
Settlements	—			(3,338		)	—
Balance, end of the year	$	875		$	875		$	4,407