Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (32,424)	$ (35,791)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,603	1,420
Depreciation, depletion and amortization	14,859	23,154
Amortization of investment in Ecuador property	81	94
Deferred income taxes	(2,602)	(6,484)
Loss on extinguishment of debt	3,786	7,318
Amortization of discount and deferred financing fees	5,071	4,896
Unrealized gain on derivatives	(2,626)	(2,039)
Loss on retirement of assets	43
Changes in operating assets and liabilities:
Decrease in accounts receivable	16,239	4,017
Decrease in value-added tax receivable	5,489	1,106
Increase in inventory	(236)	(1,397)
Increase in other assets	(5,770)	(3,479)
Increase in income taxes receivable		(18)
Increase (decrease) in accounts payable	18,696	(8,451)
Increase (decrease) in accrued liabilities	(11,802)	915
Decrease in income taxes payable	(11,932)
Decrease in other liabilities	(237)	(883)
Net cash used in operating activities	(1,762)	(15,622)
Cash flows from investing activities:
Property and equipment additions	(5,403)	(40,284)
Decrease in restricted cash	63,680
Purchase of investment securities	(1,000)
Net cash provided by (used in) investing activities	57,277	(40,284)
Cash flows from financing activities:
Borrowings	14,545	141,719
Repayments of borrowings	(46,139)	(44,735)
Deferred and other loan fees	(3,654)	(1,925)
Proceeds from sale of common stock, net	25	47
Net cash provided by (used in) financing activities	(35,223)	95,106
Net increase in cash and cash equivalents	20,292	39,200
Cash and cash equivalents at beginning of period	83,540	58,172
Cash and cash equivalents at end of period	103,832	97,372
Cash paid for:
Interest	9,404	13,171
Income tax	13,785	653
Non — cash items:
Depletion allocated to production inventory	18	797
Depreciation on support equipment capitalized to construction in progress		5
Reclassification of property and equipment to accounts receivable and accrued liabilities	952
Gain on capital lease repayment capitalized to property and equipment		$ 180