Business Acquisitions and Noncontrolling Interests - Acquired Intangibles (Details) - Filter Resources, Inc. [Member] $ in Thousands |
Dec. 17, 2014
USD ($)
|
|---|---|
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated value | $ 10,880 |
| Customer Relationships [Member] | |
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated value | $ 10,800 |
| Weighted average useful life | 15 years |
| Amortization method | Straight-line |
| Trademarks [Member] | |
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated value | $ 80 |
| Weighted average useful life | 1 year |
| Amortization method | Straight-line |