| Component: (Network and Table) | |
|---|---|
| Network | 2411402 - Disclosure - Inventories (Details) (http://www.centuryca.com/role/InventoriesDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000949157 (http://www.sec.gov/CIK) |
| Inventory, Net [Abstract] | Period [Axis] | |
|---|---|---|
2016-12-31 | 2015-12-31 | |
Inventory, Net [Abstract] | ||
Raw materials | ||
Work-in-process | ||
Finished goods | ||
Operating and other supplies | ||
Inventories | 233,563,000 | 231,872,000 |