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STOCK BASED COMPENSATION: (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest |
|  |  |  | 2020 |  |  |  | 2019
|  | Number |  | Weighted Average Grant Date |  | Number |  | Weighted Average Grant Date
(shares in thousands) |  | Outstanding |  | Fair Value |  | Outstanding |  | Fair Value
Nonvested balance at January 1, |  | 18,931 |  |  | 43.44 |  |  | 16,999 |  |  | 45.92 |
Granted during the year |  | 19,688 |  |  | 42.50 |  |  | 19,783 |  |  | 42.52 |
Vested during the year |  | (18,895) |  |  | 43.43 |  |  | (17,851) |  |  | 44.79 |
Forfeited during the year |  | — |  |  | — |  |  | — |  |  | — |
Nonvested balance at December 31, |  | 19,724 |  |  | 42.51 |  |  | 18,931 |  |  | 43.44 |

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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding restricted stock units that are fully vested and expected to vest. Includes, but is not limited to, unvested restricted stock units for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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