CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 153,194	$ 194,057
Restricted cash	65,835	24,506
Receivables:
Joint interest billings, net	87,324	63,249
Oil sales	49,696	54,195
Related party	21,977
Other	41,585	25,893
Inventories	84,424	74,380
Prepaid expenses and other	6,857	7,209
Derivatives	34,899	31,698
Total current assets	545,791	475,187
Property and equipment:
Oil and gas properties, net	2,337,572	2,700,889
Other property, net	7,261	8,003
Property and equipment, net	2,344,833	2,708,892
Other assets:
Equity method investment	133,893
Restricted cash	44,507	54,632
Long-term receivables - joint interest billings	47,306	45,663
Deferred financing costs, net of accumulated amortization of $11,898 and $11,213 at March 31, 2017 and December 31, 2016, respectively	4,563	5,248
Long-term deferred tax assets	39,594	37,827
Derivatives	8,031	3,808
Other	14,531	10,208
Total assets	3,183,049	3,341,465
Current liabilities:
Accounts payable	217,722	220,627
Accrued liabilities	118,114	129,706
Derivatives	8,916	19,692
Total current liabilities	344,752	370,025
Long-term liabilities:
Long-term debt, net	1,174,677	1,321,874
Derivatives	5,299	14,123
Asset retirement obligations	65,223	63,574
Deferred tax liabilities	506,122	482,221
Other long-term liabilities	25,664	8,449
Total long-term liabilities	1,776,985	1,890,241
Shareholders’ equity:
Preference shares, $0.01 par value; 200,000,000 authorized shares; zero issued at March 31, 2017 and December 31, 2016
Common shares, $0.01 par value; 2,000,000,000 authorized shares; 396,816,463 and 395,859,061 issued at March 31, 2017 and December 31, 2016, respectively	3,968	3,959
Additional paid-in capital	1,984,710	1,975,247
Accumulated deficit	(879,251)	(850,410)
Treasury stock, at cost, 9,175,328 and 9,101,395 shares at March 31, 2017 and December 31, 2016, respectively	(48,115)	(47,597)
Total shareholders’ equity	1,061,312	1,081,199
Total liabilities and shareholders’ equity	$ 3,183,049	$ 3,341,465

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.