Commitments and Contingencies - Litigation (Details) - CRNF - USD ($) $ in Millions |
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2007 |
Apr. 30, 2019 |
Dec. 31, 2012 |
Dec. 31, 2011 |
Dec. 31, 2010 |
Dec. 31, 2009 |
Dec. 31, 2008 |
|
| Long-term Purchase Commitment [Line Items] | |||||||
| Property tax abatement period | 10 years | ||||||
| Increase in annual property tax expense (in excess of) | $ 10.0 | $ 10.0 | $ 10.0 | $ 10.0 | $ 10.0 | ||
| Recoverable amount through favorable property tax assessments | $ 7.9 | ||||||