Revenue Recognition (Contract Balances) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
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| Changes in contract liabilities | ||||
| Balance at Beginning of Period | $ 2,300 | $ 2,219 | $ 2,006 | $ 2,048 |
| Additions | 7,816 | 4,351 | 10,151 | 6,171 |
| Deductions | (3,230) | (3,254) | (5,271) | (4,903) |
| Balance at End of Period | 6,886 | 3,316 | 6,886 | 3,316 |
| Contract assets | 0 | 0 | 0 | 0 |
| Revenue recognized included in contract liabilities at the beginning of the period | $ 913 | $ 1,106 | $ 1,285 | $ 1,385 |
| X | ||||||||||
- Definition Amount of increase in obligation to transfer good or service to customer for which consideration from customer has been received or is due. No definition available.
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- Definition Amount of (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due. No definition available.
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- References No definition available.
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| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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