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Note 16 - Guarantor Subsidiaries (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Condensed Balance Sheet [Table Text Block]
 
  
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
)
    
124,769
      
—
  
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
  
 
  
As of December 31, 2015
  
 
  
Parent
    
Guarantors
    
Non-Guarantors
    
Eliminations
    
Consolidated
  
 
  
(in thousands)
  
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
   $
94,167
     $
42,692
     $
18,350
     $
—
     $
155,209
  
Other current assets
    
15,972
      
58,453
      
32,273
      
7,626
      
114,324
  
Properties, plants, and equipment - net
    
2,281
      
1,147,770
      
746,760
      
—
      
1,896,811
  
Intercompany receivable (payable)
    
540,665
      
(301,291
)
    
(332,553
)
    
93,179
      
—
  
Investments in subsidiaries
    
1,252,191
      
—
      
—
      
(1,252,191
)
    
—
  
Other non-current assets
    
2,200
      
165,080
      
1,781
      
(113,480
)
    
55,581
  
Total assets
   $
1,907,476
     $
1,112,704
     $
466,611
     $
(1,264,866
)
   $
2,221,925
  
Liabilities and Stockholders' Equity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Current liabilities
   $
21,087
     $
84,559
     $
30,636
     $
(9,198
)
   $
127,084
  
Long-term debt
    
499,729
      
6,128
      
3,183
      
—
      
509,040
  
Non-current portion of accrued reclamation
    
—
      
45,494
      
29,055
      
—
      
74,549
  
Non-current deferred tax liability
    
—
      
3,264
      
119,836
      
(3,477
)
    
119,623
  
Other non-current liabilities
    
47,734
      
5,834
      
(865
)
    
—
      
52,703
  
Stockholders' equity
    
1,338,926
      
967,425
      
284,766
      
(1,252,191
)
    
1,338,926
  
Total liabilities and stockholders' equity
   $
1,907,476
     $
1,112,704
     $
466,611
     $
(1,264,866
)
   $
2,221,925
  
Condensed Income Statement [Table Text Block]
 
 
Year Ended December 31, 2016
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Revenues
   $
(14,237
)
   $
369,162
     $
291,032
     $
—
     $
645,957
  
Cost of sales
    
—
      
(203,133
)
    
(135,850
)
    
—
      
(338,983
)
Depreciation, depletion, and amortization
    
—
      
(64,374
)
    
(51,094
)
    
—
      
(115,468
)
General and administrative
    
(23,262
)
    
(20,425
)
    
(1,353
)
    
—
      
(45,040
)
Exploration and pre-development
    
(304
)
    
(6,640
)
    
(10,913
)
    
—
      
(17,857
)
Gain on derivative contracts
    
4,423
      
—
      
—
      
—
      
4,423
  
Acquisition costs
    
(2,607
)
    
(34
)
    
(54
)
    
—
      
(2,695
)
Equity in earnings of subsidiaries
    
94,878
      
—
      
—
      
(94,878
)
    
—
  
Other (expense) income
    
10,656
      
11,400
      
(36,074
)
    
(19,344
)
    
(33,362
)
(Loss) income before income taxes
    
69,547
      
85,956
      
55,694
      
(114,222
)
    
96,975
  
(Provision) benefit from income taxes
    
—
      
(25,334
)
    
(21,438
)
    
19,344
      
(27,428
)
Net (loss) income
    
69,547
      
60,622
      
34,256
      
(94,878
)
    
69,547
  
Preferred stock dividends
    
(552
)
    
—
      
—
      
—
      
(552
)
(Loss) income applicable to common stockholders
    
68,995
      
60,622
      
34,256
      
(94,878
)
    
68,995
  
Net (loss) income
    
69,547
      
60,622
      
34,256
      
(94,878
)
    
69,547
  
Changes in comprehensive (loss) income
    
(1,971
)
    
8
      
2,657
      
(2,665
)
    
(1,971
)
Comprehensive (loss) income
   $
67,576
     $
60,630
     $
36,913
     $
(97,543
)
   $
67,576
  
 
 
Year Ended December 31, 2015
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Revenues
   $
6,194
     $
287,941
     $
149,432
     $
—
     $
443,567
  
Cost of sales
    
—
      
(192,683
)
    
(100,884
)
    
—
      
(293,567
)
Depreciation, depletion, and amortization
    
—
      
(67,815
)
    
(43,674
)
    
—
      
(111,489
)
General and administrative
    
(17,920
)
    
(14,508
)
    
(1,773
)
    
—
      
(34,201
)
Exploration and pre-development
    
(627
)
    
(7,177
)
    
(14,154
)
    
—
      
(21,958
)
Loss on derivative contracts
    
8,252
      
—
      
—
      
—
      
8,252
  
Closed operations
    
(517
)
    
(1,645
)
    
—
      
—
      
(2,162
)
Equity in earnings of subsidiaries
    
49,565
      
—
      
—
      
(49,565
)
    
—
  
Other (expense) income
    
(131,915
)
    
22,537
      
36,090
      
54,188
      
(19,100
)
Income (loss) before income taxes
    
(86,968
)
    
26,650
      
25,037
      
4,623
      
(30,658
)
(Provision) benefit from income taxes
    
—
      
(7,251
)
    
5,129
      
(54,188
)
    
(56,310
)
Net income (loss)
    
(86,968
)
    
19,399
      
30,166
      
(49,565
)
    
(86,968
)
Preferred stock dividends
    
(552
)
    
—
      
—
      
—
      
(552
)
Income (loss) applicable to common stockholders
    
(87,520
)
    
19,399
      
30,166
      
(49,565
)
    
(87,520
)
Net income (loss)
    
(86,968
)
    
19,399
      
30,166
      
(49,565
)
    
(86,968
)
Changes in comprehensive income (loss)
    
(600
)
    
(467
)
    
259
      
208
      
(600
)
Comprehensive income (loss)
   $
(87,568
)
   $
18,932
     $
30,425
     $
(49,357
)
   $
(87,568
)
 
 
Year Ended December 31, 2014
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Revenues
   $
1,473
     $
333,460
     $
165,848
     $
—
     $
500,781
  
Cost of sales
    
—
      
(194,600
)
    
(109,846
)
    
—
      
(304,446
)
Depreciation, depletion, and amortization
    
—
      
(72,937
)
    
(38,197
)
    
—
      
(111,134
)
General and administrative
    
(17,667
)
    
(12,694
)
    
(1,177
)
    
—
      
(31,538
)
Exploration and pre-development
    
(252
)
    
(7,088
)
    
(12,327
)
    
—
      
(19,667
)
Gain on derivative contracts
    
9,134
      
—
      
—
      
—
      
9,134
  
Closed operations
    
—
      
—
      
—
      
—
      
—
  
Equity in earnings of subsidiaries
    
72,407
      
—
      
—
      
(72,407
)
    
—
  
Other (expense) income
    
(47,271
)
    
29,753
      
3,267
      
(16,295
)
    
(30,546
)
(Loss) income before income taxes
    
17,824
      
75,894
      
7,568
      
(88,702
)
    
12,584
  
(Provision) benefit from income taxes
    
—
      
(10,565
)
    
(490
)
    
16,295
      
5,240
  
Net (loss) income
    
17,824
      
65,329
      
7,078
      
(72,407
)
    
17,824
  
Preferred stock dividends
    
(552
)
    
—
      
—
      
—
      
(552
)
(Loss) income applicable to common stockholders
    
17,272
      
65,329
      
7,078
      
(72,407
)
    
17,272
  
Net (loss) income
    
17,824
      
65,329
      
7,078
      
(72,407
)
    
17,824
  
Changes in comprehensive (loss) income
    
(5,732
)
    
(1,329
)
    
1,152
      
177
      
(5,732
)
Comprehensive (loss) income
   $
12,092
     $
64,000
     $
8,230
     $
(72,230
)
   $
12,092
  
Condensed Cash Flow Statement [Table Text Block]
 
 
Year Ended December 31, 2016
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Cash flows from operating activities
   $
85,665
 
   $
82,778
     $
76,491
     $
(19,606
 )    $
225,328
  
Cash flows from investing activities:
                                        
Additions to properties, plants, and equipment
    
(348
)
    
(93,541
)
    
(70,899
)
    
—
      
(164,788
)
Purchase of other companies, net of cash acquired
    
(3,931
)
    
—
      
—
      
—
      
(3,931
)
Other investing activities, net
    
(29,383
)
    
(896
)
    
333
      
—
      
(29,946
)
Cash flows from financing activities:
                                        
Dividends paid to stockholders
    
(4,419
)
    
—
      
—
      
 
      
(4,419
)
Payments on debt
    
—
      
(10,174
)
    
(982
)
    
—
      
(11,156
)
Other financing activity
    
(28,476
 )     
3,529
      
8,895
      
19,606
 
    
3,554
  
Effect of exchange rate changes on cash
    
—
      
—
      
(74
)
    
—
      
(74
)
Changes in cash and cash equivalents
    
19,108
      
(18,304
)
    
13,764
      
—
      
14,568
  
Beginning cash and cash equivalents
    
94,167
      
42,692
      
18,350
      
—
      
155,209
  
Ending cash and cash equivalents
   $
113,275
     $
24,388
     $
32,114
     $
—
     $
169,777
  
 
 
Year Ended December 31, 2015
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Cash flows from operating activities
   $
(56,036
)
   $
101,254
     $
63,856
     $
(2,629
)
   $
106,445
  
Cash flows from investing activities:
    
 
      
 
      
 
      
 
      
—
  
Additions to properties, plants, and equipment
    
(1,355
)
    
(97,684
)
    
(38,404
)
    
—
      
(137,443
)
Other investing activities, net
    
(748
)
    
637
      
(1,052
)
    
—
      
(1,163
)
Cash flows from financing activities:
    
 
      
 
      
 
      
 
      
—
  
Dividends paid to stockholders
    
(4,291
)
    
—
      
—
      
—
      
(4,291
)
Payments on debt
    
—
      
(12,405
)
    
1,554
      
—
      
(10,851
)
Other financing activity
    
9,712
      
17,066
      
(31,408
)
    
2,629
      
(2,001
)
Effect of exchange rate changes on cash
    
—
      
—
      
(5,152
)
    
—
      
(5,152
)
Changes in cash and cash equivalents
    
(52,718
)
    
8,868
      
(10,606
)
    
—
      
(54,456
)
Beginning cash and cash equivalents
    
146,885
      
33,824
      
28,956
      
—
      
209,665
  
Ending cash and cash equivalents
   $
94,167
     $
42,692
     $
18,350
     $
—
     $
155,209
  
 
 
Year Ended December 31, 2014
 
 
 
Parent
 
 
Guarantors
 
 
Non-Guarantors
 
 
Eliminations
 
 
Consolidated
 
 
 
(in thousands)
 
Cash flows from operating activities
   $
38,270
     $
61,900
     $
58,277
     $
(75,323
)
   $
83,124
  
Cash flows from investing activities:
    
 
      
 
      
 
      
 
      
—
  
Additions to properties, plants, and equipment
    
(1,336
)
    
(68,859
)
    
(52,342
)
    
—
      
(122,537
)
Other investing activities
    
—
      
417
      
3,765
      
—
      
4,182
  
Cash flows from financing activities:
    
 
      
 
      
 
      
 
      
—
  
Dividends paid to stockholders
    
(4,099
)
    
—
      
—
      
—
      
(4,099
)
Payments on debt
    
—
      
(9,137
)
    
—
      
—
      
(9,137
)
Other financing activity
    
(12,221
)
    
9,494
      
(22,856
)
    
75,323
      
49,740
  
Effect of exchange rates on cash
    
—
      
—
      
(3,783
)
    
—
      
(3,783
)
Changes in cash and cash equivalents
    
20,614
      
(6,185
)
    
(16,939
)
    
—
      
(2,510
)
Beginning cash and cash equivalents
    
126,271
      
40,009
      
45,895
      
—
      
212,175
  
Ending cash and cash equivalents
   $
146,885
     $
33,824
     $
28,956
     $
—
     $
209,665