Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The fair values of our financial instruments as of March 31, 2016 are presented in the following table:

	Fair Value Measurements Using
(in thousands)	Level 1		Level 2		Fair Value
Financial Assets:
Cash and cash equivalents	$	133,104	$	—	$	133,104
Restricted cash	—		11,043		11,043
Marketable securities	23,346		—		23,346
Total Financial Assets	$	156,450	$	11,043	$	167,493
Financial Liabilities:
Total debt	$	—	$	1,326,095	$	1,326,095
Derivatives:
Liability for interest rate swap agreements	$	—	$	8,580	$	8,580

The fair values of our financial instruments as of December 31, 2015 are presented in the following table:

	Fair Value Measurements Using
(in thousands)	Level 1		Level 2		Fair Value
Financial Assets:
Cash and cash equivalents	$	99,090	$	—	$	99,090
Restricted cash	—		10,926		10,926
Marketable securities	22,709		—		22,709
Total Financial Assets	$	121,799	$	10,926	$	132,725
Financial Liabilities:
Total debt	$	—	$	1,315,473	$	1,315,473
Derivatives:
Liability for interest rate swap agreements	$	—	$	4,370	$	4,370