Subsequent Events: (Details) - Subsequent Event $ / shares in Units, $ in Millions	Oct. 13, 2021 USD ($) $ / shares
Subsequent Events
Special cash dividend (in dollars per share) \| $ / shares	$ 7.50
Special cash dividend \| $	$ 27.2

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Period Type:	duration