CONDENSED BALANCE SHEETS - Successor - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 234,053	$ 150,045
Short-term investments	17,501	17,501
Trade accounts receivable	128,541	65,896
Other receivables	19,881	5,901
Inventories, net	33,902	39,420
Prepaid expenses	18,958	12,010
Total current assets	452,836	290,773
Mineral interests, net	132,329	143,231
Property, plant and equipment, net	514,066	496,959
Other long-term assets	21,394	16,668
Total assets	1,120,625	947,631
Current liabilities:
Accounts payable	16,593	6,043
Accrued expenses	54,168	47,339
Other current liabilities	4,538	8,405
Current portion of long-term debt	2,936	2,849
Total current liabilities	78,235	64,636
Long-term debt	1,512	3,725
Asset retirement obligations	98,232	96,050
Other long-term liabilities	28,253	30,253
Total liabilities	206,232	194,664
Commitments and contingencies
Stockholders’ Equity:
Common stock, $0.01 par value per share (Authorized -140,000,000 shares, issued and outstanding - 53,446,284 and 53,442,532, respectively)	534	533
Preferred stock, $0.01 par value per share (10,000,000 shares authorized, no shares issued and outstanding)	0	0
Additional paid in capital	610,992	802,107
Retained earnings (accumulated deficit)	302,867	(49,673)
Total stockholders’ equity	914,393	752,967
Total liabilities and stockholders’ equity	$ 1,120,625	$ 947,631

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).

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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.