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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 |  |
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Jun. 30, 2014 | Sep. 30, 2013 | Mar. 31, 2014 Griffith Energy Services, Inc. | Jun. 30, 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 |  |  | 17,478 |  |  |
Intangible assets |  |  |  |  |  | 44,400
Other long term assets |  |  | 1,778 |  |  |
Current liabilities |  |  | (30,089) |  |  |
Total net identifiable assets acquired |  |  | 90,726 |  |  |
Total consideration |  |  | 98,698 |  |  |
Less: Total net identifiable assets acquired |  |  | 90,726 |  |  |
Goodwill | $ 209,102 | $ 201,130 | $ 7,972 |  | $ 8,000 |
[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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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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