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Quarterly results of operations (unaudited) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Quarterly results of operations (unaudited) | Quarterly results of operations (unaudited) The following tables summarize the Company's results by quarter for the years ended December 31, 2013 and 2012. The quarterly results may not be comparable primarily due to acquisitions in 2013 and 2012. Refer to Note 3, Acquisitions, for further information.
| 2013
(in thousands, except per share information) | Q1 |  | Q2 |  | Q3 |  | Q4
Net sales | $ | 372,999 |  |  | $ | 367,887 |  |  | $ | 390,192 |  |  | $ | 393,733 |
Cost of sales | 258,193 |  |  | 253,404 |  |  | 265,021 |  |  | 272,968 |
Gross profit | 114,806 |  |  | 114,483 |  |  | 125,171 |  |  | 120,765 |
Total operating expenses | 65,593 |  |  | 67,345 |  |  | 72,179 |  |  | 67,866 |
Earnings from equity investment | — |  |  | — |  |  | 2,946 |  |  | 4,366 |
Operating income | 49,213 |  |  | 47,138 |  |  | 55,938 |  |  | 57,265 |
Total other expense | 1,896 |  |  | 4,130 |  |  | 8,833 |  |  | 8,613 |
Income before income taxes | 47,317 |  |  | 43,008 |  |  | 47,105 |  |  | 48,652 |
Provision for income tax expense | 15,379 |  |  | 13,068 |  |  | 13,924 |  |  | 14,107 |
Net income | 31,938 |  |  | 29,940 |  |  | 33,181 |  |  | 34,545 |
Less: Income (loss) attributable to noncontrolling interest | (2 | ) |  | 21 |  |  | 40 |  |  | 6 |
Net income attributable to common stockholders | $ | 31,940 |  |  | $ | 29,919 |  |  | $ | 33,141 |  |  | $ | 34,539 |
Weighted average shares outstanding |  |  |  |  |  |  |
Basic | 88,533 |  |  | 91,032 |  |  | 91,443 |  |  | 91,743 |
Diluted | 94,356 |  |  | 94,606 |  |  | 94,734 |  |  | 94,936 |
Earnings per share |  |  |  |  |  |  |
Basic | $ | 0.36 |  |  | $ | 0.33 |  |  | $ | 0.36 |  |  | $ | 0.38 |
Diluted | $ | 0.34 |  |  | $ | 0.32 |  |  | $ | 0.35 |  |  | $ | 0.36 |
| 2012
(in thousands, except per share information) | Q1 |  | Q2 |  | Q3 |  | Q4
Net sales | $ | 363,489 |  |  | $ | 373,512 |  |  | $ | 347,767 |  |  | $ | 330,165 |
Cost of sales | 237,046 |  |  | 250,710 |  |  | 231,273 |  |  | 232,847 |
Gross profit | 126,443 |  |  | 122,802 |  |  | 116,494 |  |  | 97,318 |
Total operating expenses | 56,230 |  |  | 52,964 |  |  | 53,590 |  |  | 59,393 |
Operating income | 70,213 |  |  | 69,838 |  |  | 62,904 |  |  | 37,925 |
Total other expense | 5,817 |  |  | 3,958 |  |  | 4,356 |  |  | 3,954 |
Income before income taxes | 64,396 |  |  | 65,880 |  |  | 58,548 |  |  | 33,971 |
Provision for income tax expense | 21,885 |  |  | 21,742 |  |  | 17,605 |  |  | 10,033 |
Net income | 42,511 |  |  | 44,138 |  |  | 40,943 |  |  | 23,938 |
Less: Income attributable to noncontrolling interest | 29 |  |  | 17 |  |  | 20 |  |  | 8 |
Net income attributable to common stockholders | $ | 42,482 |  |  | $ | 44,121 |  |  | $ | 40,923 |  |  | $ | 23,930 |
Weighted average shares outstanding |  |  |  |  |  |  |
Basic | 67,960 |  |  | 82,495 |  |  | 84,993 |  |  | 86,077 |
Diluted | 74,741 |  |  | 89,794 |  |  | 92,339 |  |  | 93,355 |
Earnings per share |  |  |  |  |  |  |
Basic | $ | 0.63 |  |  | $ | 0.53 |  |  | $ | 0.48 |  |  | $ | 0.28 |
Diluted | $ | 0.57 |  |  | $ | 0.49 |  |  | $ | 0.44 |  |  | $ | 0.26 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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