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Goodwill and Intangible Assets (Detail) - (Table 3) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Mar. 31, 2015 | Dec. 31, 2018 | Dec. 31, 2017
Goodwill [Line Items] |  |  |  |
2012 (remaining nine months) |  |  | $ 4,329 |
2013 |  |  | 3,543 |
2014 |  |  | 1,994 |
2015 |  |  | 1,487 |
2016 |  |  | 1,487 |
Thereafter |  |  | 8,768 |
Total |  |  | 21,608 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 1 | $ 3 | 4,045 | $ 4,045
Customer Lists [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 47,019 |  | 47,019 | 47,019
Accumulated amortization | 24,127 |  | 28,049 | 24,127
Net carrying amount | 22,892 |  | 18,970 | 22,892
Licensing Agreements [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 5,600 |  | 5,600 | 5,600
Accumulated amortization | 5,600 |  | 5,600 | 5,600
Net carrying amount | 0 |  | 0 | 0
Noncompete Agreements [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 2,440 |  | 2,440 | 2,440
Accumulated amortization | 2,375 |  | 2,440 | 2,375
Net carrying amount | 65 |  | 0 | 65
Contractual Rights [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 4,200 |  | 4,200 | 4,200
Accumulated amortization | 4,200 |  | 4,200 | 4,200
Net carrying amount | 0 |  | 0 | 0
Other Intangible Assets [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 14 |  | 14 | 14
Accumulated amortization | 14 |  | 14 | 14
Net carrying amount | 0 |  | 0 | 0
Total [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 68,493 |  | 68,493 | 68,493
Accumulated amortization | 41,076 |  | 46,885 | 41,076
Net carrying amount | 27,417 |  | 21,608 | 27,417
Trademarks [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Cost basis | 100,333 |  | 100,333 | 100,333
Accumulated amortization | 0 |  | 0 | 0
Net carrying amount | $ 96,288 |  | $ 96,288 | $ 96,288

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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