X0306 4 2019-10-31 false 0000752714 MCGRATH RENTCORP MGRC 0001357113 Whitney David M 5700 LAS POSITAS ROAD LIVERMORE CA 94551 false true false false VP, Controller, PAO Common Stock 2019-10-31 4 M false 400 34.57 A 6285 D Common Stock 2019-10-31 4 M false 335 31.99 A 6620 D Common Stock 2019-10-31 4 M false 1005 24.6 A 7625 D Common Stock 2019-10-31 4 M false 1905 24.6 A 12901 I Spouse's Holding Common Stock 2019-10-31 4 M false 630 31.99 A 13531 I Spouse's Holding Common Stock 2019-10-31 4 M false 835 34.57 A 14366 I Spouse's Holding Common Stock 2019-10-31 4 F false 1066 78.4599 D 13300 I Spouse's Holding Common Stock 2019-10-31 4 F false 553 78.4599 D 7072 D Common Stock 2019-10-31 4 D false 630 78.4599 D 6442 D Common Stock 2019-10-31 4 D false 1223 78.4599 D 12077 I Spouse's Holding Stock Appreciation Right 34.57 2019-10-31 4 M false 400 0 D 2018-03-02 2024-03-02 Common Stock 400 4000 D Stock Appreciation Right 24.6 2019-10-31 4 M false 1905 0 D 2017-03-01 2023-03-01 Common Stock 1905 11430 I Spouse's Holding Stock Appreciation Right 34.57 2019-10-31 4 M false 835 0 D 2018-03-02 2024-03-02 Common Stock 835 8350 I Spouse's Holding Stock Appreciation Right 31.99 2019-10-31 4 M false 335 0 D 2016-03-02 2022-03-02 Common Stock 335 670 D Stock Appreciation Right 24.6 2019-10-31 4 M false 1005 0 D 2017-03-01 2023-03-01 Common Stock 1005 6030 D Stock Appreciation Right 31.99 2019-10-31 4 M false 630 0 D 2016-03-02 2022-03-02 Common Stock 630 1260 I Spouse's Holding Kay Dashner, POA for David Whitney 2019-11-04