Long-Term Debt - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2010	Dec. 31, 2009
Debt Instrument [Line Items]
Deferred financing costs, Net Carrying Amount		$ 763	$ 570
Senior Secured Notes, 8.50%
Debt Instrument [Line Items]
Long-term debt, face amount			25,000
TDC | Senior Secured Notes, 8.50%
Debt Instrument [Line Items]
Long-term debt, face amount			$ 25,000		$ 25,000
Long-term debt, stated interest rate		8.50%	8.50%		8.50%
Deferred financing costs, Net Carrying Amount		$ 200	$ 100
Interest bearing note, maturity date			Dec. 30, 2020
Sharyland Projects, L.L.C | Senior Secured Credit Facilities
Debt Instrument [Line Items]
Long-term debt, face amount			$ 60,000
Long-term debt, stated interest rate			5.04%
Construction term loan outstanding converted into term loan				$ 407,000
Interest bearing note, maturity date			Jun. 20, 2018
Sharyland Projects, L.L.C | Senior Secured Credit Facilities | LIBOR
Debt Instrument [Line Items]
Interest rate			2.25%
SDTS Credit Agreements | Series A Notes
Debt Instrument [Line Items]
Long-term debt, face amount		$ 400,000
Long-term debt, stated interest rate		3.86%
Interest bearing note, maturity date			Dec. 03, 2025
Long-Term Debt Maturity Period		10 years
SDTS Credit Agreements | Series B Notes
Debt Instrument [Line Items]
Long-term debt, face amount	$ 100,000
Long-term debt, stated interest rate	3.86%
Interest bearing note, maturity date			Jan. 14, 2026
Long-Term Debt Maturity Period	10 years
SDTS Credit Agreements | Senior Secured Notes, 7.25%
Debt Instrument [Line Items]
Long-term debt, face amount			$ 53,500			$ 53,500
Long-term debt, stated interest rate		7.25%	7.25%			7.25%
Interest bearing note, maturity date			Dec. 30, 2029
SDTS Credit Agreements | Senior Secured Notes, 6.47%
Debt Instrument [Line Items]
Long-term debt, face amount			$ 110,000		$ 110,000
Long-term debt, stated interest rate		6.47%	6.47%		6.47%
Interest bearing note, maturity date			Sep. 30, 2030