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Contingencies - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Contingencies |  |  |  |  |
Cayman Water Retail Operations, Percentage Of Gross Profit | 50.00% | 48.00% | 53.00% | 56.00% |
Cayman Water Retail Operations, Percentage Of Revenue | 39.00% | 34.00% | 39.00% | 39.00% |
WSC [Member] |  |  |  |  |
Contingencies |  |  |  |  |
Accounts Receivable, Net | $ 16.2 |  | $ 16.2 |  | $ 17.6

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- Definition Represents the percentage of consolidated revenue from Cayman Water retail operations. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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