Leases - Future Payments Against Lease Liabilities Maturity (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Finance leases
Reminder of fiscal year	$ 494
Next fiscal Year or Year 1	988
Second fiscal year or year 2	983
Third fiscal year or year 3	949
Fourth fiscal year or year 4	929
Thereafter	2,072
Total undiscounted lease payments	6,415
Less imputed interest	(858)
Total lease liabilities	5,557
Operating leases
Reminder of fiscal year	1,494
Next fiscal Year or Year 1	2,605
Second fiscal year or year 2	2,556
Third fiscal year or year 3	2,471
Fourth fiscal year or year 4	2,362
Thereafter	51,153
Total undiscounted lease payments	62,641
Less imputed interest	(32,590)
Total lease liabilities	$ 30,051
Operating Lease, Liability, Statement of Financial Position [Extensible List]	pei:AccruedExpenseAndOtherLiabilitiesMember
Total
Reminder of fiscal year	$ 1,988
Next fiscal Year or Year 1	3,593
Second fiscal year or year 2	3,539
Third fiscal year or year 3	3,420
Fourth fiscal year or year 4	3,291
Thereafter	53,225
Total undiscounted lease payments	69,056
Less imputed interest	(33,448)
Total lease liabilities	$ 35,608