INCOME TAXES (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation from the tax computed at statutory income tax rates to the Company's income tax expense
Tax computed at statutory U.S. federal income tax rates									$ 16,270	$ 15,679	$ 9,203
Valuation allowance									711	832
Foreign tax reserve									2,081	2,359	556
State taxes									1,032	906	(76)
Research and development credit										(1,971)
Other, net									516	1,711	(13)
Income tax expense	(1,758)	2,481	4,868	3,945	11,799	4,145	2,673	2,214	9,536	20,831	14,620
Guyana
Reconciliation from the tax computed at statutory income tax rates to the Company's income tax expense
Income taxes in excess (below) of statutory U.S. tax rates									701	812	2,096
Bermuda and Turks & Caicos
Reconciliation from the tax computed at statutory income tax rates to the Company's income tax expense
Income taxes in excess (below) of statutory U.S. tax rates									(3,203)	503	2,854
Turks & Caicos intercompany note receivable write-down
Reconciliation from the tax computed at statutory income tax rates to the Company's income tax expense
Income taxes in excess (below) of statutory U.S. tax rates									$ (8,572)