Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended	6 Months Ended		6 Months Ended							6 Months Ended	1 Months Ended	3 Months Ended		6 Months Ended				6 Months Ended			6 Months Ended								3 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Land	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Fourth Amendment [Member]	Mar. 31, 2014 Letter Agreement [Member]	Jun. 30, 2014 PEAKS Guarantee [Member]	Jun. 30, 2014 J P Morgan Chase Bank [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Minimum [Member] Fourth Amendment [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Credit Agreement [Member]	Mar. 21, 2012 Credit Agreement [Member]	Jun. 30, 2014 Amended Credit Agreement [Member]	Jun. 30, 2014 Amended Credit Agreement [Member] Minimum [Member]	Jun. 30, 2014 Amended Credit Agreement [Member] Maximum [Member]	Feb. 28, 2013 PEAKS Senior Debt [Member]	Jun. 30, 2014 PEAKS Senior Debt [Member]	Jun. 30, 2013 PEAKS Senior Debt [Member]	Jun. 30, 2014 PEAKS Senior Debt [Member]	Jun. 30, 2013 PEAKS Senior Debt [Member]	Jan. 31, 2010 PEAKS Senior Debt [Member]	Jun. 30, 2014 PEAKS Senior Debt [Member] Minimum [Member]	Jun. 30, 2014 Term Facility [Member] Cerberus Business Finance LLC [Member]	Oct. 31, 2014 Scenario Forecast [Member]	Sep. 30, 2014 Scenario Forecast [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from September 15, 2014 through and including March 21, 2015 [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from March 22, 2015 through and including March 21, 2016 [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from March 22, 2016 through and including March 21, 2017 [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from March 22, 2017 through and including March 21, 2018 [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from March 22, 2018 through and including March 21, 2019 [Member]	Jun. 30, 2014 Scenario Forecast [Member] For the period from March 22, 2019 through November 15, 2019 [Member]	Jun. 30, 2014 Scenario Forecast [Member] PEAKS Guarantee [Member]	Oct. 31, 2014 Scenario Forecast [Member] Maximum [Member]	Sep. 30, 2014 Subsequent Event [Member]	Sep. 15, 2014 Subsequent Event [Member]	Oct. 09, 2014 Subsequent Event [Member] PEAKS Guarantee [Member]	Nov. 17, 2014 Subsequent Event [Member] Term Facility [Member] Cerberus Business Finance LLC [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount														$ 325,000																									$ 100,000
Revolving credit facility, maturity date													Mar. 21, 2015
Revised maximum borrowing capacity															135,000
Letter of credit agreement borrowing capacity									2,352							25,000	85,000
Letter of credit payable																										79,708	106								82,060
Outstanding borrowing under Amended Credit Agreement	50,000		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%
Ticking fee rate																												0.00%	1.00%	2.00%	3.00%	4.00%	5.00%
Number of mortgages parcels of land owned			30
Percentage of cash collateral amount equal to face amount	109.00%		109.00%																																		109.00%
Percentage of cash collateral amount equal to face amount of ED Letter of Credit	103.00%		103.00%																																		103.00%
Amended Credit Agreement before reduction						75,000
Amended Credit Agreement after reduction						5,000
Percentage of net cash proceeds from Mortgaged Property											75.00%
Net cash proceeds received																	125,000
Secured indebtedness before reduction						25,000
Secured indebtedness after reduction						5,000
Aggregate principal amount of debt																							300,000
Debt instrument maturity date																					Jan. 31, 2020				Dec. 15, 2014
Variable rate percentage																					5.50%
Minimum LIBOR rate applied																								2.00%
Required Asset/Liability ratio								1.40		1.05		1.40
Amount of guarantee payment							40,000	60,340																										158,800		51,700		50,000
Aggregate Principal Amount																		257,533			214,516
Carrying value senior debt																			190,871		190,871
Current liability	132,429	102,695	132,429	102,695	157,883														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																			10.20%	9.60%	9.80%	10.30%