Long-Term Debt - Additional Information (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
	Jun. 05, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Debt Instrument [Line Items]
Deferred financing costs, Net Carrying Amount		$ 473	$ 570
2017 Term Loan
Debt Instrument [Line Items]
Long-term debt, face amount		200,000
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		$ 100	$ 100
SDTS Credit Agreements | Senior Secured Notes, 5.04%
Debt Instrument [Line Items]
Long-term debt, face amount		$ 60,000			$ 60,000
Long-term debt, stated interest rate		5.04%	5.04%		5.04%
SDTS Credit Agreements | 2017 Term Loan | Canadian Imperial Bank of Commerce, New York Branch and Mizuho Bank, Ltd.
Debt Instrument [Line Items]
Long-term debt, face amount	$ 200,000
Interest rate description		The interest rate for the 2017 Term Loan is based, at SDTS’s option, at a rate equal to either (1) a base rate, determined as the greatest of (a) the administrative agent’s prime rate, (b) the federal funds effective rate plus 0.5% and (c) LIBOR plus 1.00% per annum, plus a margin of 0.25% per annum or (2) LIBOR plus a margin of 1.25% per annum. The LIBOR interest period may be one, two, three or six months, but interest is payable no less frequently than quarterly.
SDTS Credit Agreements | 2017 Term Loan | Canadian Imperial Bank of Commerce, New York Branch and Mizuho Bank, Ltd. | Federal Funds Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
SDTS Credit Agreements | 2017 Term Loan | Canadian Imperial Bank of Commerce, New York Branch and Mizuho Bank, Ltd. | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
SDTS Credit Agreements | 2017 Term Loan | Canadian Imperial Bank of Commerce, New York Branch and Mizuho Bank, Ltd. | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.25%
SDTS Credit Agreements | 2017 Term Loan | Canadian Imperial Bank of Commerce, New York Branch and Mizuho Bank, Ltd. | One, Two, Three or Six Month London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
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%
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%
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%
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%
Long-Term Debt Maturity Period			10 years