Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

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)
2019	$	360	$	(132	)	$	(4	)	$	224
2018	$	387	$	—		$	(27	)	$	360
2017	$	425	$	285		$	(323	)	$	387

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)
2019	$	4,131	$	2,663	$	(1,354	)	$	5,440
2018	$	3,881	$	2,195	$	(1,945	)	$	4,131
2017	$	3,639	$	1,295	$	(1,053	)	$	3,881

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, 2019				December 31, 2018
	Gross carrying amount		Accumulated amortization		Gross carrying amount		Accumulated amortization
	(In thousands)
Technologies	$	47,608	$	27,650	$	47,647	$	24,785
Intellectual property		10,000		1,333		10,000		833
Non-compete agreements		572		431		2,322		2,076
Licenses		650		509		650		492
Customer lists		8,023		3,234		8,023		2,623
Customer relationships		25,220		14,730		25,220		12,282
Trade names		9,203		5,226		9,595		4,948
Total intangibles	$	101,276	$	53,113	$	103,457	$	48,039

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		Costs incurred			Balance at end of year
	(In thousands)
2019	$	4,206	$	6,616	$	(5,239	)	$	5,583
2018	$	3,367	$	3,274	$	(2,435	)	$	4,206
2017	$	2,779	$	4,081	$	(3,493	)	$	3,367

Schedule of Accumulated Other Comprehensive Income (Loss)

Components of accumulated other comprehensive income at December 31, 2019 are as follows:

	Pension and postretirement benefits			Foreign currency			Total
	(In thousands)
Balance at beginning of period	$	360		$	220		$	580
Other comprehensive loss before reclassifications		—			(58	)		(58	)
Amounts reclassified from accumulated other comprehensive income    (loss), net of tax of $16		(97	)		—			(97	)
Net current period other comprehensive loss, net		(97	)		(58	)		(155	)
Accumulated other comprehensive income	$	263		$	162		$	425

Details of reclassifications out of accumulated other comprehensive income during 2019 are as follows:

	Amount reclassified from accumulated other comprehensive income (loss)
	(In thousands)
Amortization of employee benefit plan items:
Actuarial gains and losses (1)	$	(639	)
Plan settlement (2)		526
Total before tax		(113	)
Income tax impact		16
Amount reclassified out of accumulated other comprehensive income (loss)	$	(97	)

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

(2) This accumulated other comprehensive income component resulted from an international pension plan settlement.

Components of accumulated other comprehensive (loss) income 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,    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 (loss) during 2018 are as follows:

	Amount reclassified from accumulated other comprehensive income
	(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.”