Related Parties (Details)		1 Months Ended		3 Months Ended		6 Months Ended
	May 27, 2021 USD ($)	May 31, 2021 plane	Sep. 30, 2018	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) space	Jun. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Lessee, lease term			75 months
Operating cash flows from operating leases				$ 4,200,000	$ 3,600,000	$ 7,900,000	$ 7,100,000
Total lease liability balance				76,600,000		76,600,000
Banker Steel Acquisition
Related Party Transaction [Line Items]
Bankers Steel debt - assumed	$ 6,300,000
Subordinated Debt
Related Party Transaction [Line Items]
Interest expense				100,000	0	100,000	0
Subordinated Debt | Banker Steel Acquisition
Related Party Transaction [Line Items]
Bankers Steel debt - assumed				6,300,000		6,300,000
Subordinated Borrowing, Interest Rate	11.00%
Triple Ring | Affiliated Entity
Related Party Transaction [Line Items]
Expenses under service agreement				0	300,000	$ 0	1,000,000.0
Banker Steel | Affiliated Entity | Office Space
Related Party Transaction [Line Items]
Number of office spaces | space						2
Operating cash flows from operating leases						$ 10,000
Lease expense				10,000	0	10,000	0
Total lease liability balance				200,000		200,000
Banker Steel | Affiliated Entity | Planes
Related Party Transaction [Line Items]
Operating cash flows from operating leases						200,000
Lease expense				200,000	$ 0	200,000	$ 0
Total lease liability balance				$ 4,500,000		$ 4,500,000
Number of planes leased | plane		2