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Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Income Statement [Abstract] |  |  |  |  |  |
Net sales | $ 1,468,388 |  | $ 800,230 | $ 2,899,713 |  | $ 1,555,437
Cost of sales | (1,157,580) |  | (604,980) | (2,287,501) |  | (1,174,941)
Gross profit | 310,808 |  | 195,250 | 612,212 |  | 380,496
Selling, general, and administrative expenses | (122,848) |  | (74,225) | (239,362) |  | (149,510)
Other expense, net | (7,712) |  | (10,828) | (31,694) |  | (14,789)
Income from operations | 180,248 | [1] | 110,197 | 341,156 | [1] | 216,197
Interest expense, net | (21,409) | [1] | (9,232) | (42,200) | [1] | (18,483)
Income before taxes | 158,839 | [1] | 100,965 | 298,956 | [1] | 197,714
Income tax provision | (59,282) |  | (34,713) | (109,313) |  | (69,168)
Net income | 99,557 |  | 66,252 | 189,643 |  | 128,546
Net income per common share: |  |  |  |  |  |
Basic | $ 1.01 |  | $ 0.69 | $ 1.93 |  | $ 1.33
Diluted | $ 1.01 |  | $ 0.68 | $ 1.93 |  | $ 1.32
Dividends declared per common share | $ 0.40 |  | $ 0.40 | $ 0.80 |  | $ 0.71
Statements of Comprehensive Income: |  |  |  |  |  |
Net income | 99,557 |  | 66,252 | 189,643 |  | 128,546
Foreign currency translation adjustment, net of tax of $70, $0, $30, and $0, respectively | (74) |  | 0 | (92) |  | 0
Reclassification adjustments to cash flow hedges included in net income, net of tax of $553, $553, $1,115, and $1,105, respectively | 869 |  | 870 | 1,729 |  | 1,739
Amortization of pension and postretirement plans actuarial loss and prior service cost, net of tax of $688, $4,221, $1,472, and $5,421, respectively | 1,078 |  | 6,645 | 2,057 |  | 8,534
Changes in unfunded employee benefit obligation, net of tax of $0, $5,370, $0, and $5,370, respectively | 0 |  | 8,455 | 0 |  | 8,455
Other comprehensive income | 1,873 |  | 15,970 | 3,694 |  | 18,728
Comprehensive income | $ 101,430 |  | $ 82,222 | $ 193,337 |  | $ 147,274
[1] | On October 25, 2013, we acquired Boise. The 2014 results include Boise for the full period.

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