Preliminary Purchase Price and Related Allocations (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012
Air Serv
Purchase price:
Total cash consideration	$ 162,881
Allocated to:
Cash and cash equivalents	10,686
Trade accounts receivable	52,552
Prepaid expenses and other	5,559
Property, plant and equipment	17,488
Other intangible assets	44,612
Goodwill	83,585
Other assets	27
Trade accounts payable	(4,609)
Accrued liabilities	(26,019)
Insurance claims	(9,151)
Net deferred income tax liabilities	(5,563)
Other	(6,286)
Net assets acquired	162,881
HHA
Purchase price:
Total cash consideration	33,680
Allocated to:
Cash and cash equivalents	832
Trade accounts receivable	3,161
Prepaid expenses and other	942
Property, plant and equipment	123
Other intangible assets	15,000
Goodwill	23,728
Other assets	468
Trade accounts payable	(667)
Accrued liabilities	(4,452)
Insurance claims
Net deferred income tax liabilities	(5,438)
Other	(17)
Net assets acquired	33,680
Calvert-Jones
Purchase price:
Total cash consideration	6,250
Allocated to:
Cash and cash equivalents
Trade accounts receivable	1,241
Prepaid expenses and other	441
Property, plant and equipment	49
Other intangible assets	2,600
Goodwill	4,284
Other assets
Trade accounts payable	(1,200)
Accrued liabilities	(861)
Insurance claims
Net deferred income tax liabilities
Other	(304)
Net assets acquired	$ 6,250