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Revenue Recognition (Contract Balances) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Trade accounts receivable, net
Balance, January 1, 2020	$ 15,444
Balance, September 30, 2020	16,507
Increase (decrease) in accounts receivable	1,063
Contract liability (current)
Balance, January 1, 2020	944
Balance, September 30, 2020	941
Increase (decrease) in contract liability (current)	(3)
Contract liability (long-term)
Balance, January 1, 2020	2,153
Balance, September 30, 2020	1,448
Increase (decrease) in contract liability (long-term)	$ (705)

X

- Definition

Change in Contract with Customer, Asset [Roll Forward]

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Change in Contract with Customer, Current Liability [Roll Forward]

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Change in Contract with Customer, Noncurrent Liability [Roll Forward]

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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