Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Changes in Allowance for Doubtful Accounts

Changes in the Company's allowance for doubtful accounts are as follows:

	Balance at beginning of year		Provision and reserve adjustments		Write-offs less recoveries			Balance at end of year
	(In thousands)
2018	$	387	$	—	$	(27	)	$	360
2017	$	425	$	285	$	(323	)	$	387
2016	$	477	$	2	$	(54	)	$	425

Schedule of Changes to Obsolete and Excess Inventories Reserve

Changes to the Company's obsolete and excess inventories reserve are as follows:

	Balance at beginning of year		Net additions charged to earnings		Disposals			Balance at end of year
	(In thousands)
2018	$	3,881	$	2,195	$	(1,945	)	$	4,131
2017	$	3,639	$	1,295	$	(1,053	)	$	3,881
2016	$	3,836	$	1,017	$	(1,214	)	$	3,639

Schedule of Carrying Value and Accumulated Amortization of Intangible Assets

The carrying value and accumulated amortization by major class of intangible assets are as follows:

	December 31, 2018				December 31, 2017
	Gross carrying amount		Accumulated amortization		Gross carrying amount		Accumulated amortization
	(In thousands)
Technologies	$	47,647	$	24,785	$	47,647	$	21,882
Intellectual property		10,000		833		10,000		333
Non-compete agreements		2,322		2,076		2,322		1,923
Licenses		650		492		650		475
Customer lists		8,023		2,623		8,023		2,011
Customer relationships		25,220		12,282		21,620		9,649
Trade names		9,595		4,948		9,595		4,258
Total intangibles	$	103,457	$	48,039	$	99,857	$	40,531

Schedule of Changes in Warranty and After-Sale Costs Reserve

Changes in the Company's warranty and after-sale costs reserve are as follows:

	Balance at beginning of year		Net additions charged to earnings		Adjustments to pre-existing warranties			Costs incurred			Balance at end of year
	(In thousands)
2018	$	3,367	$	3,269	$	5		$	(2,435	)	$	4,206
2017	$	2,779	$	4,520	$	(439	)	$	(3,493	)	$	3,367
2016	$	3,133	$	3,559	$	(554	)	$	(3,359	)	$	2,779

Schedule of Accumulated Other Comprehensive Income (Loss)

Components of accumulated other comprehensive income (loss) at December 31, 2018 are as follows:

	Pension and postretirement benefits			Foreign currency			Total
	(In thousands)
Balance at beginning of period	$	(11,597	)	$	704		$	(10,893	)
Other comprehensive income (loss) before reclassifications		—			(484	)		(484	)
Amounts reclassified from accumulated other comprehensive income    (loss), net of tax of $(5.1 million)		13,657			—			13,657
Net current period other comprehensive income (loss), net		13,657			(484	)		13,173
Cumulative impact of adopting ASU 2018-02		(1,700	)		—			(1,700	)
Accumulated other comprehensive income	$	360		$	220		$	580

Details of reclassifications out of accumulated other comprehensive income during 2018 are as follows:

	Amount reclassified from accumulated other comprehensive loss
	(In thousands)
Amortization of employee benefit plan items:
Prior service cost (1)	$	(13	)
Settlement expense (1)		19,900
Actuarial loss (1)		(1,103	)
Total before tax		18,784
Income tax impact		(5,127	)
Amount reclassified out of accumulated other comprehensive income	$	13,657

(1) These accumulated other comprehensive loss components are included in the computation of benefit plan costs in Note 7 “Employee Benefit Plans.”

Components of accumulated other comprehensive (loss) income at December 31, 2017 are as follows:

	Pension and postretirement benefits			Foreign currency			Total
	(In thousands)
Balance at beginning of period	$	(10,495	)	$	(1,140	)	$	(11,635	)
Other comprehensive income before reclassifications		—			1,844			1,844
Amounts reclassified from accumulated other comprehensive loss, net of    tax of $0.3 million		(1,102	)		—			(1,102	)
Net current period other comprehensive (loss) income, net		(1,102	)		1,844			742
Accumulated other comprehensive (loss) income	$	(11,597	)	$	704		$	(10,893	)

Details of reclassifications out of accumulated other comprehensive loss during 2017 are as follows:

	Amount reclassified from accumulated other comprehensive loss
	(In thousands)
Amortization of employee benefit plan items:
Prior service cost (1)	$	(25	)
Settlement expense (1)		641
Actuarial loss (1)		(2,010	)
Total before tax		(1,394	)
Income tax impact		292
Amount reclassified out of accumulated other comprehensive loss	$	(1,102	)

(1) These accumulated other comprehensive loss components are included in the computation of benefit plan costs in Note 7 “Employee Benefit Plans.”