Business Combinations (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Jan. 01, 2012 BII Holding [Member]	Feb. 10, 2011 BII Holding [Member] Acquisition Date Estimated Fair Value [Member]	Jan. 01, 2012 BII Holding [Member] Scenario, Adjustment [Member]	Aug. 12, 2010 Cornell Companies Inc [Member]
Purchase price allocation
Accounts receivable	$ 19,619	$ 18,321
Prepaid expenses and other current assets	3,896	3,896
Deferred income tax assets	7,934	15,857
Property and equipment	23,260	22,359
Intangible assets	131,800	126,900
Other non-current assets	8,884	8,884
Total assets acquired	195,393	196,217		873,700
Accounts payable	(3,977)	(3,977)
Accrued expenses	(8,461)	(8,461)
Deferred income tax liabilities	36,787	43,824
Other non-current liabilities	(6,020)	(11,431)
Long-term debt	(2,014)	(2,014)
Total liabilities assumed	(57,259)	(69,707)		(234,700)
Total identifiable net assets	138,134	126,510
Goodwill	271,473	283,097		196,400
Total consideration for Cornell, net of cash acquired	409,607	409,607
Measurement Period Adjustments, Accounts receivable			1,298
Measurement Period Adjustments, Deferred income tax assets			(7,923)
Measurement Period Adjustments, Property and equipment			901
Measurement Period Adjustments, Intangible assets			4,900
Measurement Period Adjustments, Assets Acquired			(824)
Measurement Period Adjustments Deferred income tax liabilities			7,037
Measurement Period Adjustments, Other non-current liabilities			5,411
Measurement Period Adjustments Liabilities Assumed			12,448
Measurement Period Adjustments Identifiable Net Assets			11,624
Aggregate respective adjustments			$ 11,624