Revenues (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2019 |
Dec. 31, 2018 |
|
| Revenue Recognition [Abstract] | |||
| Revenue recognized | $ 14,100 | $ 31,900 | |
| Deferred revenue noncurrent portion | 16,652 | 16,652 | $ 18,422 |
| Remaining performance obligations | 91,100 | 91,100 | |
| Expected remaining performance obligations recognized during next 12 months | 71,700 | 71,700 | |
| Expected remaining performance obligations recognized subsequent to next 12 months | 13,600 | 13,600 | |
| Expected remaining performance obligations recognized remainder thereafter | 5,700 | 5,700 | |
| Deferred sales commissions | $ 3,500 | $ 3,500 | $ 3,100 |
| X | ||||||||||
- Definition Expected remaining performance obligations recognized during next 12 months. No definition available.
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| X | ||||||||||
- Definition Expected remaining performance obligations recognized subsequent to next 12 months and thereafter. No definition available.
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| X | ||||||||||
- Definition Expected remaining performance obligations recognized remainder thereafter. No definition available.
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| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. No definition available.
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| X | ||||||||||
- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Carrying amount of advanced commission payments. No definition available.
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| X | ||||||||||
- Definition The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- References No definition available.
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