Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands |
1 Months Ended |
3 Months Ended |
9 Months Ended |
Jun. 30, 2020 |
May 30, 2020 |
Jun. 01, 2019 |
May 30, 2020 |
Jun. 01, 2019 |
| Components Of Shareholders Equity [Line Items] |
|
|
|
|
|
| Treasury stock reissued to fund plan, shares |
|
20,000
|
14,000
|
55,000
|
47,000
|
| Subsequent Event [Member] |
|
|
|
|
|
| Components Of Shareholders Equity [Line Items] |
|
|
|
|
|
| Dividends payable per share |
$ 0.75
|
|
|
|
|
| Dividend payable date |
Jul. 28, 2020
|
|
|
|
|
| Dividends record date |
Jul. 14, 2020
|
|
|
|
|
| Dividend payable amount |
$ 41,685
|
|
|
|
|
| Class A Common Stock [Member] |
|
|
|
|
|
| Components Of Shareholders Equity [Line Items] |
|
|
|
|
|
| Common stock shares repurchased |
|
500
|
500
|
44,000
|
316,000
|
| Treasury stock repurchased, and treasury stock repurchased and retired, shares |
|
|
|
|
1,054,000
|
| Treasury stock repurchased, and treasury stock repurchased and retired, amount |
|
|
$ 39
|
|
$ 84,464
|
| Number of shares authorized for repurchase |
|
1,157,000
|
|
1,157,000
|
|
| Treasury Stock [Member] | Class A Common Stock [Member] |
|
|
|
|
|
| Components Of Shareholders Equity [Line Items] |
|
|
|
|
|
| Purchase of treasury stock |
|
$ 28
|
$ 39
|
$ 3,236
|
$ 24,137
|