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Quarterly Results of Operations (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]  
Summary of Unaudited Quarterly Results of Operations

The following summarizes the unaudited quarterly results of operations for the fourth quarter ended December 31, 2017.

 

Fourth Quarter 2017

   

Net sales

    $ 156,135  

Cost of sales (exclusive of depreciation and amortization)

      118,814  

Income (loss) from continuing operations

      53,325  

Income from discontinued operations, net of tax

      (2,507 ) 

Net income (loss)

      50,818  

Comprehensive income (loss)

      51,885  

Basic income (loss) from continuing operations per share

    $ 1.93  

Basic net income (loss) per share

    $ 1.84  

Diluted income (loss) from continuing operations per share

    $ 1.91  

Diluted net income (loss) per share

    $ 1.82  

The effect of recasting the prior periods for the PBC discontinued operations as described in Note 2 is also reflected below.

 

     As
Originally
Reported		     Adjustment     Discontinued
Operations		     As Revised  

Third Quarter 2017

         

Net sales

    $ 148,156     $ —         $ 148,156  

Cost of sales (exclusive of depreciation and amortization)

      110,836       436         111,272  

Income (loss) from continuing operations

      (2,930 )      (550 )        (3,480 ) 

Income from discontinued operations, net of tax

      135,825       (6,384 )        129,441  

Net income (loss)

      132,895       (6,934 )        125,961  

Comprehensive income (loss)

      129,735       (6,606 )        123,129  

Basic income (loss) from continuing operations per share

    $ (0.11 )    $ (0.02 )      $ (0.13 ) 

Basic net income (loss) per share

    $ 4.82     $ (0.25 )      $ 4.57  

Diluted income (loss) from continuing operations per share

    $ (0.11 )    $ (0.02 )      $ (0.13 ) 

Diluted net income (loss) per share

    $ 4.82     $ (0.25 )      $ 4.57  

Second Quarter 2017

         

Net sales

    $ 225,875     $ —       $ (67,928 )    $ 157,947  

Cost of sales (exclusive of depreciation and amortization)

      166,040       —         (51,526 )      114,514  

Income (loss) from continuing operations

      (21,529 )      391       (5,236 )      (26,374 ) 

Income from discontinued operations, net of tax

      —         —         5,236       5,236  

Net income (loss)

      (21,529 )      391         (21,138 ) 

Comprehensive income (loss)

      (12,289 )      662         (11,627 ) 

Basic income (loss) from continuing operations per share

    $ (0.78 )    $ 0.01     $ (0.19 )    $ (0.96 ) 

Basic net income (loss) per share

    $ (0.78 )    $ 0.01       $ (0.77 ) 

Diluted income (loss) from continuing operations per share

    $ (0.78 )    $ 0.01     $ (0.19 )    $ (0.96 ) 

Diluted net income (loss) per share

    $ (0.78 )    $ 0.01       $ (0.77 ) 

First Quarter 2017

         

Net sales

    $ 226,314     $ —       $ (68,759 )    $ 157,555  

Cost of sales (exclusive of depreciation and amortization)

      166,954       485       (52,959 )      114,480  

Income (loss) from continuing operations

      7,407       4       (5,518 )      1,893  

Income from discontinued operations, net of tax

      —         —         5,518       5,518  

Net income (loss)

      7,407       4         7,411  

Comprehensive income (loss)

      12,113       403         12,516  

Basic income (loss) from continuing operations per share

    $ 0.27     $ 0.00     $ (0.20 )    $ 0.07  

Basic net income (loss) per share

    $ 0.27     $ 0.00       $ 0.27  

Diluted income (loss) from continuing operations per share

    $ 0.27     $ 0.00     $ (0.20 )    $ 0.07  

Diluted net income (loss) per share

    $ 0.27     $ 0.00       $ 0.27  

 

     As
Originally
Reported		     Adjustment     Discontinued
Operations		     As Revised  

Fourth Quarter 2016

         

Net sales

    $ 202,029     $ —       $ (60,385 )    $ 141,644  

Cost of sales (exclusive of depreciation and amortization)

      151,936       466       (47,597 )      104,805  

Income (loss) from continuing operations

      3,063       (1,512 )      (3,737 )      (2,186 ) 

Income from discontinued operations, net of tax

      —         —         3,737       3,737  

Net income (loss)

      3,063       (1,512 )        1,551  

Comprehensive income (loss)

      (10,212 )      (90 )        (10,302 ) 

Basic income (loss) from continuing operations per share

    $ 0.11     $ (0.06 )    $ (0.14 )    $ (0.08 ) 

Basic net income (loss) per share

    $ 0.11     $ (0.06 )      $ 0.06  

Diluted income (loss) from continuing operations per share

    $ 0.11     $ (0.06 )    $ (0.14 )    $ (0.08 ) 

Diluted net income (loss) per share

    $ 0.11     $ (0.06 )      $ 0.06  

Third Quarter 2016

         

Net sales

    $ 204,961     $ —       $ (58,247 )    $ 146,714  

Cost of sales (exclusive of depreciation and amortization)

      152,538       91       (45,353 )      107,276  

Income (loss) from continuing operations

      4,147       419       (3,622 )      944  

Income from discontinued operations, net of tax

      —         —         3,622       3,622  

Net income (loss)

      4,147       419         4,566  

Comprehensive income (loss)

      8,740       (2,938 )        5,802  

Basic income (loss) from continuing operations per share

    $ 0.15     $ 0.02     $ (0.13 )    $ 0.03  

Basic net income (loss) per share

    $ 0.15     $ 0.02       $ 0.17  

Diluted income (loss) from continuing operations per share

    $ 0.15     $ 0.02     $ (0.13 )    $ 0.03  

Diluted net income (loss) per share

    $ 0.15     $ 0.02       $ 0.17  

Second Quarter 2016

         

Net sales

    $ 214,272     $ —       $ (65,157 )    $ 149,115  

Cost of sales (exclusive of depreciation and amortization)

      156,794       114       (49,580 )      107,328  

Income (loss) from continuing operations

      2,031       (172 )      (4,326 )      (2,467 ) 

Income from discontinued operations, net of tax

      —         —         4,326       4,326  

Net income (loss)

      2,031       (172 )        1,859  

Comprehensive income (loss)

      (973 )      (1,879 )        (2,852 ) 

Basic income (loss) from continuing operations per share

    $ 0.08     $ (0.01 )    $ (0.16 )    $ (0.09 ) 

Basic net income (loss) per share

    $ 0.08     $ (0.01 )      $ 0.07  

Diluted income (loss) from continuing operations per share

    $ 0.07     $ (0.01 )    $ (0.16 )    $ (0.09 ) 

Diluted net income (loss) per share

    $ 0.07     $ (0.01 )      $ 0.07  

First Quarter 2016

         

Net sales

    $ 212,226     $ —       $ (64,745 )    $ 147,481  

Cost of sales (exclusive of depreciation and amortization)

      159,754       144       (50,464 )      109,434  

Income (loss) from continuing operations

      (1,299 )      (14 )      (4,468 )      (5,781 ) 

Income from discontinued operations, net of tax

      —         —         4,468       4,468  

Net income (loss)

      (1,299 )      (14 )        (1,313 ) 

Comprehensive income (loss)

      4,418       884         5,302  

Basic income (loss) from continuing operations per share

    $ (0.05 )    $ (0.00 )    $ (0.17 )    $ (0.22 ) 

Basic net income (loss) per share

    $ (0.05 )    $ (0.00 )      $ (0.05 ) 

Diluted income (loss) from continuing operations per share

    $ (0.05 )    $ (0.00 )    $ (0.17 )    $ (0.22 ) 

Diluted net income (loss) per share

    $ (0.05 )    $ (0.00 )      $ (0.05 )