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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Allowance for Doubtful Accounts

The change in amounts of the allowance for doubtful accounts during the three year period ended December 31, 2018 is as follows (in thousands):

Period ended		Balance at beginning of period				Charged to expense				Deductions or other				Balance at end of period
December 31, 2016		$	8,119			$	485			$	(5,273	)		$	3,331
December 31, 2017		3,331				2,903				(439		)		5,795
December 31, 2018		5,795				3,342				(1,705		)		7,432

Schedule of Product Warranty Liability

Changes in the Company’s warranty liability were as follows (in thousands):

Period ended		Balance at beginning of period				Charged to expense				Deductions or other				Balance at end of period
December 31, 2016		$	5,697			$	4,031			$	(6,504	)		$	3,224
December 31, 2017		3,224				3,172				(2,776		)		3,620
December 31, 2018		3,620				1,487				(2,237		)		2,870

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- References

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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