Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

		December 31,
	Interest rate	2014		2013
Notes due March 2015	5.0%	$	274,879	$	274,879
Notes due January 2016	4.75%	370,914		370,914
Notes due September 2017	5.75%	385,109		500,000
Notes due March 2018	5.6%	250,000		250,000
Notes due May 2018	4.75%	350,000		350,000
Notes due March 2019	6.25%	300,000		300,000
Notes due November 2022	5.25%	110,000		110,000
Notes due March 2024	4.625%	500,000		—
State of CT DECD loan due November 2024	2.0%	16,000		—
Notes due January 2037	5.25%	115,041		500,000
Notes due March 2043	6.7%	425,000		425,000
Term loans	Variable	130,000		230,000
Principal amount		3,226,943		3,310,793
Less: unamortized discount		6,653		5,158
Plus: unamortized interest rate swap proceeds		31,716		40,660
Total debt		3,252,006		3,346,295
Less: current portion long-term debt		324,879		—
Long-term debt		$	2,927,127	$	3,346,295

Schedule of Maturities of Long-term Debt

Annual maturities of outstanding debt at December 31, 2014 are as follows:

2015	$	324,879
2016	450,914
2017	385,109
2018	600,000
2019	300,000
Thereafter	1,166,041
Total	$	3,226,943