Reportable Segment Information (Parenthetical) (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
|
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Jul. 31, 2016 |
Jul. 31, 2015 |
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Restructuring charge |
$ 2,080
|
$ 1,839
|
$ 2,379
|
$ 8,269
|
|
|
| Asset impairment charges |
73,051
|
|
83,474
|
|
|
|
| Cash and cash equivalents |
158,633
|
128,124
|
158,633
|
128,124
|
$ 118,697
|
$ 123,800
|
| Corporate |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Cash and cash equivalents |
144,900
|
|
144,900
|
|
$ 97,300
|
|
| Pathfinder |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Asset impairment charges |
0
|
|
600
|
|
|
|
| Medical Imaging |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Restructuring charge |
200
|
1,100
|
400
|
5,100
|
|
|
| Ultrasound |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Restructuring charge |
1,800
|
400
|
1,900
|
1,700
|
|
|
| Goodwill impairment charges |
55,100
|
|
55,100
|
|
|
|
| Oncura |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Contingent consideration charges |
(2,100)
|
|
(10,200)
|
|
|
|
| Asset impairment charges |
3,100
|
|
3,100
|
|
|
|
| Goodwill impairment charges |
6,700
|
|
16,500
|
|
|
|
| PocketSonics |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Asset impairment charges |
8,100
|
|
8,100
|
|
|
|
| BK Medical System |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Impairment charges |
0
|
|
10,100
|
|
|
|
| Security and Detection |
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
| Restructuring charge |
$ 100
|
$ 300
|
$ 100
|
$ 1,500
|
|
|