Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes [Abstract]

Income (Loss) Before Income Taxes

For financial reporting purposes, income (loss) before income taxes includes the following components:

	Year Ended December 31
	2018				2017			2016
United States		$	(86,874	)		$	55,980		$	87,326
Foreign			896				1,237			(231	)
Income (loss) before income taxes		$	(85,978	)		$	57,217		$	87,095

Provision (Benefit) for Income Tax

The provision (benefit) for income taxes consists of the following:

	Year Ended December 31
	2018			2017			2016
Current provision (benefit):
Federal	$	(3,995	)	$	16,178		$	30,623
State		892			2,866			4,098
Foreign		3,254			874			907
Total current provision		151			19,918			35,628
Deferred provision (benefit):
Federal		(19,142	)		107			(2,653	)
State		(5,788	)		(455	)		(1,213	)
Foreign		(455	)		57			345
Total deferred benefit		(25,385	)		(291	)		(3,521	)
Total provision (benefit):
Federal		(23,137	)		16,285			27,970
State		(4,896	)		2,411			2,885
Foreign		2,799			931			1,252
Total income tax provision (benefit)	$	(25,234	)	$	19,627		$	32,107

Reconciliation of Provision for Income Taxes at Statutory Federal Income Tax Rate

A reconciliation of the provision (benefit) for income taxes at the statutory federal income tax rate to the amount provided is as follows:

	Year Ended December 31
	2018			2017			2016
Tax expense (benefit) at the statutory federal income tax rate	$	(18,055	)	$	20,026		$	30,483
Domestic production activity deduction		--			(1,661	)		(1,641	)
State income tax, net of federal income tax		(2,976	)		1,520			1,876
Research and development tax credits		(4,660	)		(922	)		(785	)
FIN 48 impact		1,856			124			(240	)
Liquidation of subsidiary		(1,403	)		--			--
Valuation allowance impact		978			1,585			1,638
U.S. tax reform impact		(193	)		(505	)		--
Other items		(781	)		(540	)		776
Total income tax provision (benefit)	$	(25,234	)	$	19,627		$	32,107

Significant Components of Company's Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities are as follows:

	December 31
	2018			2017
Deferred tax assets:
Inventory reserves	$	4,513		$	4,287
Warranty reserves		2,275			3,560
Bad debt reserves		182			299
State tax loss carryforwards		7,265			2,710
Accrued vacation		1,612			1,712
SERP		364			367
Deferred compensation		881			1,293
Restricted stock units		1,728			1,664
Goodwill		2,157			--
Pension and post-employment benefits		1,536			1,448
Outside basis difference		4,496			--
Federal net operating loss		15,655			--
Foreign net operating losses		5,069			6,310
Other		5,025			2,478
Valuation allowances		(8,540	)		(8,318	)
Total deferred tax assets		44,218			17,810
Deferred tax liabilities:
Property and equipment		16,156			14,562
Intangibles		541			769
Goodwill		--			654
Pension		1,051			758
Total deferred tax liabilities		17,748			16,743
Total net deferred assets	$	26,470		$	1,067

Rollforward of Deferred Tax Assets Valuation Allowance

The following table represents a roll forward of the deferred tax asset valuation allowance for the years ended December 31, 2018, 2017 and 2016:

	Year Ended December 31
	2018			2017			2016
Allowance balance, beginning of year	$	8,318		$	8,280		$	8,065
Provision		978			1,585			1,639
Write-offs		--			(1,862	)		(289	)
Other		(756	)		315			(1,135	)
Allowance balance, end of year	$	8,540		$	8,318		$	8,280

Reconciliation of Unrecognized Tax Benefit

A reconciliation of the beginning and ending unrecognized tax benefits excluding interest and penalties is as follows:

	Year Ended December 31
	2018			2017		2016
Balance, beginning of year	$	365		$	238	$	603
Additions for tax positions taken in current year		1,722			127		235
Reductions due to lapse of statutes of limitations		(39	)		--		(16	)
Decreases related to settlements with tax authorities		--			--		(584	)
Balance, end of year	$	2,048		$	365	$	238