Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Income Statement [Abstract] | ||||
| Net sales | $ 237,168 | $ 262,756 | $ 701,543 | $ 766,766 |
| Cost of goods sold | 209,350 | 224,421 | 614,951 | 663,095 |
| Gross profit | 27,818 | 38,335 | 86,592 | 103,671 |
| Selling, general, and administrative expenses | 18,721 | 16,063 | 52,756 | 47,952 |
| Operating income | 9,097 | 22,272 | 33,836 | 55,719 |
| Net interest and other income | (9) | (18) | (32) | (133) |
| Income before income taxes | 9,106 | 22,290 | 33,868 | 55,852 |
| Provision for income taxes | 3,107 | 7,779 | 11,431 | 19,200 |
| Net income | $ 5,999 | $ 14,511 | $ 22,437 | $ 36,652 |
| Earnings per common and common equivalent share - basic (in usd per share) | $ 0.29 | $ 0.70 | $ 1.08 | $ 1.77 |
| Weighted average common and common equivalent shares outstanding - basic (in shares) | 20,704 | 20,716 | 20,696 | 20,726 |
| Earnings per common and common equivalent share - diluted (in usd per share) | $ 0.29 | $ 0.70 | $ 1.08 | $ 1.76 |
| Weighted average common and common equivalent shares outstanding - diluted (in shares) | 20,775 | 20,774 | 20,763 | 20,797 |
| Cash dividends declared per share (in usd per share) | $ 0.02 | $ 0.02 | $ 0.06 | $ 0.06 |