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The amount of acquisition cost of a business combination allocated to current portion of prepayments received from customers for goods or services to be provided in the future.

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The amount of acquisition cost of a business combination allocated to amount due from related parties which are usually due within one year (or one business cycle).

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Represents the amount of employee compensation additional expense related to bonus expected to be recognized.

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Amount of accrued expenses and other payables due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of Investments in unconsolidated entities recognized as of the acquisition date.

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Represents the excess of estimated fair value of investments in nonconsolidated subsidiaries over historical net book value.

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No definition available.

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Represents the amount of amortization expense of contractual liability expected to be recognized during year one.

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Represents the cash outflow associated with assignment of contracts.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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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.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Acquisitions (Details) (USD $)	3 Months Ended									6 Months Ended		12 Months Ended			0 Months Ended
Acquisitions (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Dec. 02, 2013	Mar. 31, 2011	Jun. 19, 2012
Acquisitions
Cash paid, net of cash acquired													$ 14,000,000
Equity method ownership interest (as a percent)		50.00%										50.00%
Estimated fair values of the assets acquired and liabilities assumed
Goodwill	1,170,490,000us-gaap_Goodwill	1,107,006,000us-gaap_Goodwill				555,220,000us-gaap_Goodwill				1,170,490,000us-gaap_Goodwill		1,107,006,000us-gaap_Goodwill	555,220,000us-gaap_Goodwill	167,245,000us-gaap_Goodwill		8,568,000us-gaap_Goodwill
REVENUES	5,380,526,000us-gaap_SalesRevenueNet	3,975,935,000us-gaap_SalesRevenueNet	2,743,445,000us-gaap_SalesRevenueNet	1,593,937,000us-gaap_SalesRevenueNet	1,385,957,000us-gaap_SalesRevenueNet	1,617,613,000us-gaap_SalesRevenueNet	1,338,208,000us-gaap_SalesRevenueNet	1,135,510,000us-gaap_SalesRevenueNet	326,436,000us-gaap_SalesRevenueNet	9,029,140,000us-gaap_SalesRevenueNet	2,979,894,000us-gaap_SalesRevenueNet	9,699,274,000us-gaap_SalesRevenueNet	4,417,767,000us-gaap_SalesRevenueNet	1,310,473,000us-gaap_SalesRevenueNet
Operating income	7,770,000us-gaap_OperatingIncomeLoss			9,945,000us-gaap_OperatingIncomeLoss						(12,785,000)us-gaap_OperatingIncomeLoss	2,603,000us-gaap_OperatingIncomeLoss	106,565,000us-gaap_OperatingIncomeLoss	87,307,000us-gaap_OperatingIncomeLoss	15,030,000us-gaap_OperatingIncomeLoss
Crude oil tanks and related equipment
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment																	17,851,000
Crude oil tanks and related equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										2 years		2 years
Crude oil tanks and related equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										40 years		40 years
Vehicles \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment												3 years
Vehicles \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment												25 years
Information technology equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										3 years		3 years
Information technology equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										7 years		7 years
Buildings and leasehold improvements \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										3 years		3 years
Buildings and leasehold improvements \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										40 years		40 years
Gavilon Energy
Acquisitions
Cash paid, net of cash acquired															832,400,000
General and administrative expense		5,300,000										5,300,000
Equity method ownership interest (as a percent)															11.00%
Estimated fair values of the assets acquired and liabilities assumed
Accounts receivable - trade	326,484,000	349,529,000								326,484,000		349,529,000
Accounts receivable - affiliates	2,564,000	2,564,000								2,564,000		2,564,000
Inventories	107,430,000	107,430,000								107,430,000		107,430,000
Prepaid expenses and other current assets	68,322,000	68,322,000								68,322,000		68,322,000
Goodwill	342,769,000	359,169,000								342,769,000		359,169,000
Investments in unconsolidated entities	183,000,000	178,000,000								183,000,000		178,000,000
Other noncurrent assets	2,287,000	9,918,000								2,287,000		9,918,000
Accounts payable - trade	(342,792,000)	(342,792,000)								(342,792,000)		(342,792,000)
Accounts payable - affiliates	(2,585,000)	(2,585,000)								(2,585,000)		(2,585,000)
Accrued expenses and other payables	(49,447,000)	(70,999,000)								(49,447,000)		(70,999,000)
Advance payments received from customers	(10,667,000)	(10,667,000)								(10,667,000)		(10,667,000)
Other noncurrent liabilities	(46,056,000)	(44,740,000)								(46,056,000)		(44,740,000)
Fair value of net assets acquired	832,448,000	832,448,000								832,448,000		832,448,000
Excess of estimated fair value of investments in unconsolidated subsidiaries		70,000,000										70,000,000
Bonus expense recorded during the period										5,200,000
Additional bonus expense expected										1,600,000
REVENUES												2,900,000,000
Operating income												11,000,000
Gavilon Energy \| Employee severance
Estimated fair values of the assets acquired and liabilities assumed
Employee severance expense												3,200,000
Bonus expense recorded during the period												5,000,000
Additional bonus expense expected												6,600,000
Gavilon Energy \| Crude oil storage lease commitments
Estimated fair values of the assets acquired and liabilities assumed
Liability recorded in the acquisition accounting	15,900,000	12,900,000								15,900,000		12,900,000			13,900,000
Amortization of contract liabilities through cost of sales										5,000,000		2,900,000
Future amortization
2015												6,500,000
2016										4,040,000		3,260,000
2017										360,000		300,000
Gavilon Energy \| Storage and transportation contracts of natural gas
Estimated fair values of the assets acquired and liabilities assumed
Liability recorded in the acquisition accounting		50,800,000										50,800,000
Amortization of contract liabilities through cost of sales												6,000,000
Future amortization
Payments for assignment of contracts												44,800,000
Gavilon Energy \| Customer relationships
Estimated fair values of the assets acquired and liabilities assumed
Intangible assets	107,950,000	101,600,000								107,950,000		101,600,000
Gavilon Energy \| Customer relationships \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of intangible assets										10 years		10 years
Gavilon Energy \| Customer relationships \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of intangible assets										20 years		20 years
Gavilon Energy \| Lease contracts
Estimated fair values of the assets acquired and liabilities assumed
Intangible assets	8,700,000	8,700,000								8,700,000		8,700,000
Gavilon Energy \| Lease contracts \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of intangible assets										1 year		1 year
Gavilon Energy \| Lease contracts \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of intangible assets										5 years		5 years
Gavilon Energy \| Crude oil tanks and related equipment
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	83,797,000	77,429,000								83,797,000		77,429,000
Gavilon Energy \| Crude oil tanks and related equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										3 years		3 years
Gavilon Energy \| Crude oil tanks and related equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										40 years		40 years
Gavilon Energy \| Vehicles
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	327,000	791,000								327,000		791,000
Useful life of property, plant and equipment										3 years		3 years
Gavilon Energy \| Information technology equipment
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	4,049,000	4,046,000								4,049,000		4,046,000
Gavilon Energy \| Information technology equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										3 years		3 years
Gavilon Energy \| Information technology equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										7 years		7 years
Gavilon Energy \| Buildings and leasehold improvements
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	7,817,000	7,716,000								7,817,000		7,716,000
Gavilon Energy \| Buildings and leasehold improvements \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										3 years		3 years
Gavilon Energy \| Buildings and leasehold improvements \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment										40 years		40 years
Gavilon Energy \| Land
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	6,427,000	6,427,000								6,427,000		6,427,000
Gavilon Energy \| Linefill and tank bottoms
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment		15,230,000										15,230,000
Goodwill															29,000,000
Gavilon Energy \| Other
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	162,000	170,000								162,000		170,000
Useful life of property, plant and equipment										7 years		7 years
Gavilon Energy \| Construction in process
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment	7,180,000	7,190,000								7,180,000		7,190,000
Goodwill															$ 29,000,000
Gavilon Energy \| Glass Mountain
Acquisitions
Equity method ownership interest (as a percent)			50.00%												50.00%