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Summary of Preliminary Fair Values and Purchase Price Allocation at Acquisition Date of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified |  |  | 1 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2014 | Sep. 30, 2013 | Mar. 31, 2014 Griffith Energy Services, Inc. | Mar. 31, 2014 Griffith Energy Services, Inc. Customer lists, trade names and other intangibles
Business Acquisition [Line Items] |  |  |  |  |
Trade accounts receivable |  |  | $ 46,557 | [1] |
Inventories |  |  | 5,143 |  |
Other current assets |  |  | 5,459 |  |
Property and equipment |  |  | 17,555 |  |
Intangible assets |  |  |  |  | 49,157
Other long term assets |  |  | 1,778 |  |
Current liabilities |  |  | (30,089) |  |
Total net identifiable assets acquired |  |  | 95,560 |  |
Total consideration |  |  | 98,698 |  |
Less: Total net identifiable assets acquired |  |  | 95,560 |  |
Goodwill | $ 204,268 | $ 201,130 | $ 3,138 |  |
[1] | The gross contractual receivable amount is $48.2 million, and the best estimate at the acquisition date of the contractual cash flows not expected to be collected is $1.7 million.

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