Long-term Debt - Tables 3, 4, & 5 (Details)	Dec. 31, 2015	Nov. 30, 2015	Sep. 30, 2015	Apr. 10, 2015	Mar. 31, 2015	Dec. 31, 2014
7.75% Senior Notes Due 2022 [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal		103.875%				103.00%
7.75% Senior Notes Due 2022 [Member] | Senior Notes, Redemption Price, Period One [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	103.875%
7.75% Senior Notes Due 2022 [Member] | Senior Notes, Redemption Price, Period Two [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	102.583%
7.75% Senior Notes Due 2022 [Member] | Senior Notes, Redemption Price, Period Three [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	101.292%
7.75% Senior Notes Due 2022 [Member] | Senior Notes, Redemption Price, Period Four [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	100.00%
5.125% Senior Notes Due 2023 [Member] | Senior Notes, Redemption Price, Period One [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal					103.844%
5.125% Senior Notes Due 2023 [Member] | Senior Notes, Redemption Price, Period Two [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal					102.563%
5.125% Senior Notes Due 2023 [Member] | Senior Notes, Redemption Price, Period Three [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal					101.281%
5.125% Senior Notes Due 2023 [Member] | Senior Notes, Redemption Price, Period Four [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal					100.00%
5.75% Senior Notes Due 2024 [Member] | Senior Notes, Redemption Price, Period One [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	102.875%
5.75% Senior Notes Due 2024 [Member] | Senior Notes, Redemption Price, Period Two [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	101.917%
5.75% Senior Notes Due 2024 [Member] | Senior Notes, Redemption Price, Period Three [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	100.958%
5.75% Senior Notes Due 2024 [Member] | Senior Notes, Redemption Price, Period Four [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal	100.00%
5.75% Senior Notes Due 2025 [Member] | Senior Notes, Redemption Price, Period One [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal			102.875%
5.75% Senior Notes Due 2025 [Member] | Senior Notes, Redemption Price, Period Two [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal			101.917%
5.75% Senior Notes Due 2025 [Member] | Senior Notes, Redemption Price, Period Three [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal			100.958%
5.75% Senior Notes Due 2025 [Member] | Senior Notes, Redemption Price, Period Four [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal			100.00%
8.125% Senior Notes Due 2020 [Member]
Redemption Price, Senior Notes, Percentage of Principal [Abstract]
Senior Notes, Redemption Price, Percentage of Principal				104.063%