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STOCK BASED COMPENSATION: (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest |
|  |  |  | 2015 |  |  |  | 2014
|  | Number |  | Weighted Average Grant Date |  | Number |  | Weighted Average Grant Date
(shares in thousands) |  | Outstanding |  | Fair Value |  | Outstanding |  | Fair Value
Nonvested balance at January 1, |  | 22,084 |  |  | 31.63 |  |  | 30,496 |  |  | 33.49 |
Granted during the year |  | 19,683 |  |  | 33.87 |  |  | 22,019 |  |  | 32.17 |
Vested during the year |  | (21,301 | ) |  | 32.13 |  |  | (30,431 | ) |  | 33.52 |
Forfeited during the year |  | — |  |  | — |  |  | — |  |  | — |
Nonvested balance at December 31, |  | 20,466 |  |  | 33.26 |  |  | 22,084 |  |  | 31.63 |

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- Definition Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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