Investments and Other Assets - Additional Information (Detail) - Colorado Corporation [Member] $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Schedule of Cost-method Investments [Line Items] | |
| Cost method investment, ownership percentage | 10.00% |
| Purchase of investments | $ 10.0 |
| X | ||||||||||
- Definition Cost method investment ownership percentage. No definition available.
|
| X | ||||||||||
- Definition Schedule of cost method investment. No definition available.
|
| X | ||||||||||
- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|