Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Instruments [Abstract]

Components of Long-Term Debt

Long-term debt consisted of the following:

		March 31, 2019				December 31, 2018
(Dollar amounts in thousands)	Maturity Date	Amount Outstanding			Interest Rate	Amount Outstanding			Interest Rate
TDC
Senior secured notes - $25.0 million	December 30, 2020	$	14,687		8.50%	$	15,000		8.50%
SDTS
Senior secured term loan - $200.0 million	June 5, 2020		200,000		3.74%		200,000		3.73%
Senior secured notes - $400.0 million	December 3, 2025		400,000		3.86%		400,000		3.86%
Senior secured notes - $100.0 million	January 14, 2026		100,000		3.86%		100,000		3.86%
Senior secured notes - $53.5 million	December 30, 2029		37,762		7.25%		38,338		7.25%
Senior secured notes - $110.0 million	September 30, 2030		86,712		6.47%		87,973		6.47%
Total SDTS debt			824,474				826,311
Total long-term debt			839,161				841,311
Less unamortized deferred financing costs			(57	)			(64	)
Total long-term debt, less deferred     financing costs			839,104				841,247
Less current portion of long-term debt			(8,919	)			(8,792	)
Debt classified as long-term debt, less     deferred financing costs		$	830,185			$	832,455