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

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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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 15) (USD $)	12 Months Ended	6 Months Ended	12 Months Ended	0 Months Ended
Acquisitions (Details 15) (USD $)	Mar. 31, 2013	Sep. 30, 2014	Mar. 31, 2014	Feb. 03, 2012	Mar. 31, 2012	Mar. 31, 2011
Acquisitions
Cash paid for water facilities	$ 14,000,000
Estimated fair values of the assets acquired and liabilities assumed
Goodwill	555,220,000us-gaap_Goodwill	1,170,490,000us-gaap_Goodwill	1,107,006,000us-gaap_Goodwill		167,245,000us-gaap_Goodwill	8,568,000us-gaap_Goodwill
Retail propane equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment		2 years	2 years
Retail propane equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment		30 years	30 years
Natural gas liquids terminal assets \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment		2 years	2 years
Natural gas liquids terminal assets \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment		30 years	30 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
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
North American
Acquisitions
Cash paid for water facilities				69,800,000
General and administrative expense					1,600,000
Estimated fair values of the assets acquired and liabilities assumed
Accounts receivable - trade			10,338,000
Inventories			3,437,000
Prepaid expenses and other current assets			282,000
Goodwill			13,978,000
Assumed liabilities			(11,129,000)
Fair value of net assets acquired			69,830,000
North American \| Customer relationships
Estimated fair values of the assets acquired and liabilities assumed
Intangible assets			12,600,000
Useful life of intangible assets			10 years
North American \| Trade names
Estimated fair values of the assets acquired and liabilities assumed
Intangible assets			2,700,000
Useful life of intangible assets			10 years
North American \| Non-compete agreements
Estimated fair values of the assets acquired and liabilities assumed
Intangible assets			700,000
Useful life of intangible assets			3 years
North American \| Land
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			2,251,000
North American \| Retail propane equipment
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			24,790,000
North American \| Retail propane equipment \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			15 years
North American \| Retail propane equipment \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			20 years
North American \| Natural gas liquids terminal assets
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			1,044,000
North American \| Natural gas liquids terminal assets \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			15 years
North American \| Natural gas liquids terminal assets \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			20 years
North American \| Vehicles
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			5,819,000
North American \| Vehicles \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			5 years
North American \| Vehicles \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			15 years
North American \| Buildings and leasehold improvements
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			2,386,000
Useful life of property, plant and equipment			30 years
North American \| Other
Estimated fair values of the assets acquired and liabilities assumed
Property, plant and equipment			634,000
North American \| Other \| Minimum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			3 years
North American \| Other \| Maximum
Estimated fair values of the assets acquired and liabilities assumed
Useful life of property, plant and equipment			5 years