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Quarterly results of operations (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information | 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 Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: 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 + Details
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