Debt - Additional Information (Detail) $ in Thousands		1 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	Oct. 09, 2014 USD ($)	Mar. 31, 2014 USD ($)	Feb. 28, 2013 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 USD ($) Land	Jun. 30, 2013 USD ($)	Dec. 31, 2014 USD ($)	Nov. 17, 2014 USD ($)	Oct. 31, 2014 USD ($)	Sep. 15, 2014	Dec. 31, 2013 USD ($)	Mar. 21, 2012 USD ($)	Jan. 31, 2010 USD ($)
Line of Credit Facility [Line Items]
Outstanding borrowing under Amended Credit Agreement					$ 50,000		$ 50,000
Effective interest rate on borrowings					4.90%	3.30%	4.90%	3.30%
Commitment fee under the New Credit Agreement							0.40%
Number of mortgages parcels of land owned | Land							30
Percentage of cash collateral amounts equal to face amount of ED Letter of Credit					109.00%		109.00%
Percentage of cash collateral amount equal to face amount					103.00%		103.00%
Current liability					$ 132,429	$ 102,695	$ 132,429	$ 102,695					$ 157,883
Letter Agreement [Member]
Line of Credit Facility [Line Items]
Amount of guarantee payment		$ 40,000
Fourth Amendment [Member]
Line of Credit Facility [Line Items]
Amended Credit Agreement before reduction					75,000		75,000
Amended Credit Agreement after reduction							5,000
Permitted indebtedness before reduction							25,000
Permitted indebtedness after reduction					5,000		$ 5,000
PEAKS Guarantee [Member]
Line of Credit Facility [Line Items]
Required Asset/Liability ratio							1.40
Amount of guarantee payment							$ 60,340
Previously Issued by J P Morgan Chase Bank [Member]
Line of Credit Facility [Line Items]
Letter of credit agreement borrowing capacity					2,352		$ 2,352
Minimum [Member]
Line of Credit Facility [Line Items]
Required Asset/Liability ratio							1.05
Minimum [Member] | Fourth Amendment [Member]
Line of Credit Facility [Line Items]
Percentage of net cash proceeds from Mortgaged Property							75.00%
Maximum [Member]
Line of Credit Facility [Line Items]
Required Asset/Liability ratio							1.40
Credit Agreement [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount														$ 325,000
Revolving credit facility, maturity date							Mar. 21, 2015
Outstanding borrowing under Amended Credit Agreement					50,000		$ 50,000
Amended Credit Agreement [Member]
Line of Credit Facility [Line Items]
Revised maximum borrowing capacity					135,000		135,000
Amended Credit Agreement [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Letter of credit agreement borrowing capacity					25,000		25,000
Amended Credit Agreement [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Letter of credit agreement borrowing capacity					85,000		85,000
Net cash proceeds from sale leaseback							$ 125,000
PEAKS Senior Debt [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount of debt															$ 300,000
Debt instrument maturity date							Jan. 31, 2020
Variable rate percentage							5.50%
Aggregate Principal Amount			$ 257,533		214,516		$ 214,516
Carrying value senior debt					196,730		196,730
Current liability					$ 132,429		$ 132,429
Estimated fair value of senior debt			226,096
Difference in Estimated Fair Value and Outstanding Principal Amount			$ 31,437
Effective Interest Rate					13.00%	9.60%	16.40%	10.30%
PEAKS Senior Debt [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Minimum LIBOR rate applied					2.00%		2.00%
Term Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date							Dec. 15, 2014
For the period from September 15, 2014 through and including March 21, 2015 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							0.00%
For the period from March 22, 2015 through and including March 21, 2016 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							1.00%
For the period from March 22, 2016 through and including March 21, 2017 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							2.00%
For the period from March 22, 2017 through and including March 21, 2018 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							3.00%
For the period from March 22, 2018 through and including March 21, 2019 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							4.00%
For the period from March 22, 2019 through November 15, 2019 [Member]
Line of Credit Facility [Line Items]
Ticking fee rate							5.00%
Scenario, Forecast [Member]
Line of Credit Facility [Line Items]
Letter of credit payable				$ 106							$ 79,708
Scenario, Forecast [Member] | PEAKS Guarantee [Member]
Line of Credit Facility [Line Items]
Amount of guarantee payment									$ 158,800
Scenario, Forecast [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Letter of credit payable											$ 82,060
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Percentage of cash collateral amounts equal to face amount of ED Letter of Credit												109.00%
Percentage of cash collateral amount equal to face amount												103.00%
Amount of guarantee payment				$ 51,700
Subsequent Event [Member] | PEAKS Guarantee [Member]
Line of Credit Facility [Line Items]
Amount of guarantee payment	$ 50,000
Subsequent Event [Member] | Term Facility [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount										$ 100,000