SEGMENT INFORMATION GEOGRAPHIC INFORMATION (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities											0	6,225
Revenues from external customers	$ 307,809	$ 308,836	$ 376,067	$ 402,059	$ 383,277	$ 449,579	$ 523,731	$ 538,940	$ 2,163,595	$ 1,394,771	$ 1,895,527	$ 2,163,595
Long-lived Assets	450,020				527,414					450,020	527,414	680,882
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers									1,159,061	702,856	904,097
Long-lived Assets	190,171				223,797					190,171	223,797	266,413
BRAZIL
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers									397,426	205,070	352,342
Long-lived Assets	58,820				80,414					58,820	80,414	101,282
Other Countries [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers									$ 607,108	486,845	639,088
Long-lived Assets	$ 201,029				$ 223,203					$ 201,029	$ 223,203	$ 313,187
5.625% convertible senior subordinated notes [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities										5,600	5,600