FAIR VALUE MEASUREMENTS: (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
6.375% Senior Unsecured Notes, due 2021
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	6.375%
6.125% Senior Unsecured Notes, due 2022
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	6.125%
5.625% Senior Unsecured Notes, due 2024
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.625%
5.375% Senior Unsecured Notes due 2021
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.375%
Level 2 | Carrying Value | 8.375% Senior Notes due 2018
FAIR VALUE MEASUREMENTS:
Fair Value	$ 235,525	$ 235,225
Level 2 | Carrying Value | 6.375% Senior Unsecured Notes, due 2021
FAIR VALUE MEASUREMENTS:
Fair Value	350,000	350,000
Level 2 | Carrying Value | 6.125% Senior Unsecured Notes, due 2022
FAIR VALUE MEASUREMENTS:
Fair Value	500,000	500,000
Level 2 | Carrying Value | 5.625% Senior Unsecured Notes, due 2024
FAIR VALUE MEASUREMENTS:
Fair Value	550,000
Level 2 | Carrying Value | 5.375% Senior Unsecured Notes due 2021
FAIR VALUE MEASUREMENTS:
Fair Value	600,000	600,000
Level 2 | Carrying Value | Term Loan A
FAIR VALUE MEASUREMENTS:
Fair Value	319,260	500,000
Level 2 | Carrying Value | Term Loan B
FAIR VALUE MEASUREMENTS:
Fair Value	1,037,299	642,734
Level 2 | Carrying Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Fair Value	31,038	55,581
Level 2 | Carrying Value | Debt of other operating divisions
FAIR VALUE MEASUREMENTS:
Fair Value	105,805	86,263
Level 2 | Fair Value | 8.375% Senior Notes due 2018
FAIR VALUE MEASUREMENTS:
Fair Value	247,477	259,547
Level 2 | Fair Value | 6.375% Senior Unsecured Notes, due 2021
FAIR VALUE MEASUREMENTS:
Fair Value	363,346	360,938
Level 2 | Fair Value | 6.125% Senior Unsecured Notes, due 2022
FAIR VALUE MEASUREMENTS:
Fair Value	513,900	497,525
Level 2 | Fair Value | 5.625% Senior Unsecured Notes, due 2024
FAIR VALUE MEASUREMENTS:
Fair Value	549,945
Level 2 | Fair Value | 5.375% Senior Unsecured Notes due 2021
FAIR VALUE MEASUREMENTS:
Fair Value	588,000	582,078
Level 2 | Fair Value | Term Loan A
FAIR VALUE MEASUREMENTS:
Fair Value	312,875	495,000
Level 2 | Fair Value | Term Loan B
FAIR VALUE MEASUREMENTS:
Fair Value	1,024,004	641,205
Level 2 | Fair Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Fair Value	31,038	55,581
Level 2 | Fair Value | Debt of other operating divisions
FAIR VALUE MEASUREMENTS:
Fair Value	$ 105,805	$ 86,263