Goodwill and Intangible Assets Narrative (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||
| Goodwill recognized and expected to be deductible for income tax purposes | $ 0 | |||
| Write-off of intangibles | $ 600,000 | |||
| Amortization expense | $ 2,800,000 | $ 3,500,000 | $ 4,300,000 | |
| X | ||||||||||
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill. No definition available.
|