Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Outstanding long-term debt and capital lease obligations

	March 31, 2015		December 31, 2014
Revolving Credit Facility	$	—	$	—
4.875% Senior Notes due 2021(1), effective interest rate of 4.966%	497,964		497,876
4.625% Senior Notes due 2021(2), effective interest rate of 4.648%	299,663		299,650
3.800% Senior Notes due 2022(3), effective interest rate of 3.845%	299,134		299,109
3.850% Senior Notes due 2023(4), effective interest rate of 3.851%	299,980		299,980
Capital leases	6		25
Total debt and capital lease obligations	1,396,747		1,396,640
Current portion of long-term debt	6		25
Long-term debt, less current portion	$	1,396,741	$	1,396,615

⁽¹⁾  Net of unamortized discount of $2.0 million as of March 31, 2015, and $2.1 million as of December 31, 2014.

⁽²⁾  Net of unamortized discount of $0.3 million as of March 31, 2015, and $0.4 million as of December 31, 2014.

⁽³⁾  Net of unamortized discount of $0.9 million as of March 31, 2015, and December 31, 2014.

⁽⁴⁾  Net of unamortized discount of less than $0.1 million as of March 31, 2015, and December 31, 2014.