XML 35 R17.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Intangible Assets, net | 12 Months Ended
--- | ---
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets, net | 9. Intangible Assets, net Intangible assets include customer relationships and contracts associated with various business and asset acquisitions. These acquired intangible assets were recorded at fair value determined as of the acquisition date and are being amortized over the period we expect to benefit from the assets. Intangible assets, net consisted of the following (in thousands):
| December 31, 2018 |  | December 31, 2017
| Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Customer related (10-25 year life) | $ | 107,008 |  |  | $ | (69,678 | ) |  | $ | 107,008 |  |  | $ | (64,887 | )
Contract based (5-7 year life) | 64,556 |  |  | (49,516 | ) |  | 68,395 |  |  | (41,644 | )
Intangible assets | $ | 171,564 |  |  | $ | (119,194 | ) |  | $ | 175,403 |  |  | $ | (106,531 | )
Amortization expense of intangible assets totaled $16.5 million, $17.8 million and $17.9 million during the years ended December 31, 2018, 2017 and 2016, respectively. Estimated future intangible amortization expense is as follows (in thousands):
2019 | $ | 13,047 |
2020 | 9,562 |
2021 | 4,687 |
2022 | 3,496 |
2023 | 3,251 |
Thereafter | 18,327 |
Total | $ | 52,370 |

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
Name: | us-gaap_IntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration