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Note 13 - Guarantor Subsidiaries (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Condensed Balance Sheet [Table Text Block]
 
  
As of March 31, 2017
  
 
  
Parent
    
Guarantors
    
Non-Guarantors
    
Eliminations
    
Consolidated
  
 
  
(in thousands)
  
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
   $
104,526
     $
29,783
     $
42,477
     $
—
     $
176,786
  
Other current assets
    
49,158
      
51,092
      
38,693
      
(574
)
    
138,369
  
Properties, plants, and equipment - net
    
2,031
      
1,259,079
      
771,873
      
—
      
2,032,983
  
Intercompany receivable (payable)
    
453,210
      
(243,979
)
    
(314,308
)
    
105,077
      
—
  
Investments in subsidiaries
    
1,499,401
      
—
      
—
      
(1,499,401
)
    
—
  
Other non-current assets
    
1,761
      
188,815
      
5,534
      
(137,787
)
    
58,323
  
Total assets
   $
2,110,087
     $
1,284,790
     $
544,269
     $
(1,532,685
)
   $
2,406,461
  
                                         
Liabilities and Stockholders' Equity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Current liabilities
   $
47,831
     $
52,762
     $
47,968
     $
(15,906
)
   $
132,655
  
Long-term debt
    
501,292
      
3,692
      
2,396
      
—
      
507,380
  
Non-current portion of accrued reclamation
    
—
      
61,706
      
17,628
      
—
      
79,334
  
Non-current deferred tax liability
    
—
      
11,767
      
126,635
      
(17,377
)
    
121,025
  
Other non-current liabilities
    
46,661
      
5,328
      
(225
)
    
—
      
51,764
  
Stockholders' equity
    
1,514,303
      
1,149,535
      
349,867
      
(1,499,402
)
    
1,514,303
  
Total liabilities and stockholders' equity
   $
2,110,087
     $
1,284,790
     $
544,269
     $
(1,532,685
)
   $
2,406,461
  
 
  
As of December 31, 2016
  
 
  
Parent
    
Guarantors
    
Non-Guarantors
    
Eliminations
    
Consolidated
  
 
  
(in thousands)
  
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
   $
113,275
     $
24,388
     $
32,114
     $
—
     $
169,777
  
Other current assets
    
33,950
      
65,369
      
35,524
      
(1,236
)
    
133,607
  
Properties, plants, and equipment - net
    
2,103
      
1,258,890
      
771,692
      
—
      
2,032,685
  
Intercompany receivable (payable)
    
404,121
      
(222,072
)
    
(307,018
)
    
124,969
      
—
  
Investments in subsidiaries
    
1,496,787
      
—
      
—
      
(1,496,787
)
    
—
  
Other non-current assets
    
4,186
      
186,988
      
5,350
      
(160,916
)
    
35,608
  
Total assets
   $
2,054,422
     $
1,313,563
     $
537,662
     $
(1,533,970
)
   $
2,371,677
  
                                         
Liabilities and Stockholders' Equity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Current liabilities
   $
22,401
     $
86,730
     $
41,348
     $
(22,999
)
   $
127,480
  
Long-term debt
    
500,979
      
3,065
      
2,773
      
—
      
506,817
  
Non-current portion of accrued reclamation
    
—
      
63,025
      
16,902
      
—
      
79,927
  
Non-current deferred tax liability
    
—
      
14,212
      
121,600
      
(14,212
)
    
121,600
  
Other non-current liabilities
    
51,198
      
5,108
      
(325
)
    
28
      
56,009
  
Stockholders' equity
    
1,479,844
      
1,141,423
      
355,364
      
(1,496,787
)
    
1,479,844
  
Total liabilities and stockholders' equity
   $
2,054,422
     $
1,313,563
     $
537,662
     $
(1,533,970
)
   $
2,371,677
  
Condensed Income Statement [Table Text Block]
 
 
Three Months Ended March 31, 2017
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Revenues
   $
(4,093
)
   $
82,953
     $
63,684
     $
—
     $
142,544
  
Cost of sales
    
(148
)
    
(42,772
)
    
(35,756
)
    
—
      
(78,676
)
Depreciation, depletion, amortization
    
—
      
(15,766
)
    
(13,186
)
    
—
      
(28,952
)
General and administrative
    
(6,469
)
    
(2,319
)
    
(418
)
    
—
      
(9,206
)
Exploration and pre-development
    
(244
)
    
(1,901
)
    
(3,621
)
    
—
      
(5,766
)
Gain on derivative contracts
    
(7,809
)
    
—
      
—
      
—
      
(7,809
)
Equity in earnings of subsidiaries
    
2,701
      
—
      
—
      
(2,701
)
    
—
  
Other (expense) income
    
42,896
      
(3,116
)
    
(9,332
)
    
(44,820
)
    
(14,372
)
Income (loss) before income taxes
    
26,834
      
17,079
      
1,371
      
(47,521
)
    
(2,237
)
(Provision) benefit from income taxes
    
—
      
(8,969
)
    
(6,780
)
    
44,820
      
29,071
  
Net income (loss)
    
26,834
      
8,110
      
(5,409
)
    
(2,701
)
    
26,834
  
Preferred stock dividends
    
(138
)
    
—
      
—
      
—
      
(138
)
Income (loss) applicable to common stockholders
    
26,696
      
8,110
      
(5,409
)
    
(2,701
)
    
26,696
  
Net income (loss)
    
26,834
      
8,110
      
(5,409
)
    
(2,701
)
    
26,834
  
Changes in comprehensive income (loss)
    
3,204
      
—
      
(89
)
    
89
      
3,204
  
Comprehensive income (loss)
   $
30,038
     $
8,110
     $
(5,498
)
   $
(2,612
)
   $
30,038
  
 
 
Three Months Ended March 31, 2016
 
 
 
Parent
 
 
Guarantors
 
 
Non-
Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Revenues
   $
(6,135
)
   $
81,269
     $
55,883
     $
—
     $
131,017
  
Cost of sales
    
—
      
(46,753
)
    
(27,567
)
    
—
      
(74,320
)
Depreciation, depletion, amortization
    
—
      
(16,606
)
    
(9,269
)
    
—
      
(25,875
)
General and administrative
    
(5,240
)
    
(4,523
)
    
(451
)
    
—
      
(10,214
)
Exploration and pre-development
    
(45
)
    
(1,287
)
    
(2,022
)
    
—
      
(3,354
)
Gain on derivative contracts
    
—
      
—
      
—
      
—
      
—
  
Equity in earnings of subsidiaries
    
(20,991
)
    
—
      
—
      
20,991
      
—
  
Other (expense) income
    
31,793
      
4,336
      
(35,518
)
    
(16,829
)
    
(16,218
)
Income (loss) before income taxes
    
(618
)
    
16,436
      
(18,944
)
    
4,162
      
1,036
  
(Provision) benefit from income taxes
    
—
      
(4,833
)
    
(13,650
)
    
16,829
      
(1,654
)
Net income (loss)
    
(618
)
    
11,603
      
(32,594
)
    
20,991
      
(618
)
Preferred stock dividends
    
(138
)
    
—
      
—
      
—
      
(138
)
Income (loss) applicable to common stockholders
    
(756
)
    
11,603
      
(32,594
)
    
20,991
      
(756
)
Net income (loss)
    
(618
)
    
11,603
      
(32,594
)
    
20,991
      
(618
)
Changes in comprehensive income (loss)
    
1,065
      
8
      
1,060
      
(1,068
)
    
1,065
  
Comprehensive income (loss)
   $
447
     $
11,611
     $
(31,534
)
   $
19,923
     $
447
  
Condensed Cash Flow Statement [Table Text Block]
 
 
Three Months Ended March 31, 2017
 
 
 
Parent
 
 
Guarantors
 
 
Non-
Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Cash flows from operating activities
   $
40,953
     $
11,508
     $
15,642
     $
(29,818
)
   $
38,285
  
Cash flows from investing activities:
                                        
Additions to properties, plants, and equipment
    
—
      
(7,540
)
    
(14,118
)
    
—
      
(21,658
)
Other investing activities, net
    
(7,479
)
    
61
      
—
      
—
      
(7,418
)
Cash flows from financing activities:
                                        
Dividends paid to stockholders
    
(1,127
)
    
—
      
—
      
—
      
(1,127
)
Payments on debt
    
—
      
(1,658
)
    
(407
)
    
—
      
(2,065
)
Other financing activity
    
(41,096
)
    
3,024
      
7,432
      
29,818
      
(822
)
Effect of exchange rate changes on cash
    
—
      
—
      
1,814
      
—
      
1,814
  
Changes in cash and cash equivalents
    
(8,749
)
    
5,395
      
10,363
      
—
      
7,009
  
Beginning cash and cash equivalents
    
113,275
      
24,388
      
32,114
      
—
      
169,777
  
Ending cash and cash equivalents
   $
104,526
     $
29,783
     $
42,477
     $
—
     $
176,786
  
 
 
Three Months Ended March 31, 2016
 
 
 
Parent
 
 
Guarantors
 
 
Non-
Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Cash flows from operating activities
   $
7,848
     $
(21,658
)
   $
(7,884
)
   $
40,442
     $
18,748
  
Cash flows from investing activities:
                                        
Additions to properties, plants, and equipment
    
(53
)
    
(18,552
)
    
(16,049
)
    
—
      
(34,654
)
Other investing activities, net
    
—
      
215
      
(3,900
)
    
—
      
(3,685
)
Cash flows from financing activities:
                                        
Dividends paid to stockholders
    
(1,090
)
    
—
      
—
      
—
      
(1,090
)
Payments on debt
    
—
      
(2,556
)
    
(226
)
    
 
      
(2,782
)
Other financing activity
    
(9,833
)
    
27,189
      
23,823
      
(40,442
)
    
737
  
Effect of exchange rate changes on cash
    
—
      
—
      
1,535
      
—
      
1,535
  
Changes in cash and cash equivalents
    
(3,128
)
    
(15,362
)
    
(2,701
)
    
—
      
(21,191
)
Beginning cash and cash equivalents
    
94,167
      
42,692
      
18,350
      
—
      
155,209
  
Ending cash and cash equivalents
   $
91,039
     $
27,330
     $
15,649
     $
—
     $
134,018