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Change in Accounting Principle: Inventories (Details) (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 | Dec. 31, 2013 | Dec. 31, 2012
Consolidated Statements of Income and Comprehensive Income |  |  |  |  |  |  |  |  |  |
Cost of sales | $ (1,157,580) |  | $ (604,980) |  | $ (2,287,501) |  | $ (1,174,941) |  |  |
Gross profit | 310,808 |  | 195,250 |  | 612,212 |  | 380,496 |  |  |
Income from operations | 180,248 | [1] | 110,197 |  | 341,156 | [1] | 216,197 |  |  |
Income before taxes | 158,839 | [1] | 100,965 |  | 298,956 | [1] | 197,714 |  |  |
Provision for income taxes | (59,282) |  | (34,713) |  | (109,313) |  | (69,168) |  |  |
Net income | 99,557 |  | 66,252 |  | 189,643 |  | 128,546 |  |  |
Comprehensive income | 101,430 |  | 82,222 |  | 193,337 |  | 147,274 |  |  |
Net income per common share: |  |  |  |  |  |  |  |  |  |
Basic | $ 1.01 |  | $ 0.69 |  | $ 1.93 |  | $ 1.33 |  |  |
Diluted | $ 1.01 |  | $ 0.68 |  | $ 1.93 |  | $ 1.32 |  |  |
Consolidated Balance Sheet |  |  |  |  |  |  |  |  |  |
Inventories | 611,342 |  |  |  | 611,342 |  |  |  | 594,291 |
Deferred income tax assets | 34,091 |  |  |  | 34,091 |  |  |  | 47,616 |
Retained earnings | 1,119,367 |  |  |  | 1,119,367 |  |  |  | 1,019,101 |
Consolidated Statement of Cash Flows |  |  |  |  |  |  |  |  |  |
Net income | 99,557 |  | 66,252 |  | 189,643 |  | 128,546 |  |  |
Deferred income tax provision (benefit) |  |  |  |  | 19,583 |  | (6,786) |  |  |
Inventories |  |  |  |  | (13,277) |  | 78 |  |  |
Change in Accounting Method for Inventory Valuation | Effect of Change in Accounting Principle |  |  |  |  |  |  |  |  |  |
Consolidated Statements of Income and Comprehensive Income |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  | 2,927 |  |  |  | 5,681 |  |  |
Gross profit |  |  | 2,927 |  |  |  | 5,681 |  |  |
Income from operations |  |  | 2,927 |  |  |  | 5,681 |  |  |
Income before taxes |  |  | 2,927 |  |  |  | 5,681 |  |  |
Provision for income taxes |  |  | (1,140) |  |  |  | (2,213) |  |  |
Net income | 1,500 |  | 1,787 |  | 2,900 |  | 3,468 |  |  |
Comprehensive income |  |  | 1,787 |  |  |  | 3,468 |  |  |
Net income per common share: |  |  |  |  |  |  |  |  |  |
Basic |  |  | $ 0.02 |  |  |  | $ 0.03 |  |  |
Diluted |  |  | $ 0.02 |  |  |  | $ 0.04 |  |  |
Consolidated Balance Sheet |  |  |  |  |  |  |  |  |  |
Inventories | 67,000 |  |  |  | 67,000 |  |  |  | 71,768 |
Deferred income tax assets |  |  |  |  |  |  |  |  | (27,963) |
Retained earnings |  |  |  |  |  |  |  |  | 43,805 | 38,800
Consolidated Statement of Cash Flows |  |  |  |  |  |  |  |  |  |
Net income | 1,500 |  | 1,787 |  | 2,900 |  | 3,468 |  |  |
Deferred income tax provision (benefit) |  |  |  |  |  |  | 2,213 |  |  |
Inventories |  |  |  |  |  |  | (5,681) |  |  |
As Previously Reported (under LIFO) |  |  |  |  |  |  |  |  |  |
Consolidated Statements of Income and Comprehensive Income |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  | (607,907) | [2] |  |  | (1,180,622) | [2] |  |
Gross profit |  |  | 192,323 | [2] |  |  | 374,815 | [2] |  |
Income from operations |  |  | 107,270 | [2] |  |  | 210,516 | [2] |  |
Income before taxes |  |  | 98,038 | [2] |  |  | 192,033 | [2] |  |
Provision for income taxes |  |  | (33,573) | [2] |  |  | (66,955) | [2] |  |
Net income |  |  | 64,465 | [2] |  |  | 125,078 | [2] |  |
Comprehensive income |  |  | 80,435 | [2] |  |  | 143,806 | [2] |  |
Net income per common share: |  |  |  |  |  |  |  |  |  |
Basic |  |  | $ 0.67 | [2] |  |  | $ 1.30 | [2] |  |
Diluted |  |  | $ 0.66 | [2] |  |  | $ 1.28 | [2] |  |
Consolidated Balance Sheet |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  |  | 522,523 |
Deferred income tax assets |  |  |  |  |  |  |  |  | 75,579 |
Retained earnings |  |  |  |  |  |  |  |  | 975,296 |
Consolidated Statement of Cash Flows |  |  |  |  |  |  |  |  |  |
Net income |  |  | 64,465 | [2] |  |  | 125,078 | [2] |  |
Deferred income tax provision (benefit) |  |  |  |  |  |  | (8,999) |  |  |
Inventories |  |  |  |  |  |  | $ 5,759 |  |  |
[1] | On October 25, 2013, we acquired Boise. The 2014 results include Boise for the full period.
[2] | Certain amounts in prior periods' consolidated financial statements have been reclassified to conform with the current period presentation.

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