Loan Servicing Rights - Summary of Loan Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 18	$ 23
Acquired in the Merger	59,567	59,567
New servicing assets created	1,906	1,906
Impairment (charge) recovery	(4,520)	(4,520)
Amortization	(1,670)	(1,675)
Balance, end of period	55,301	55,301
Valuation allowance, end of period	(4,520)	(4,520)
Loans serviced for others that have servicing rights capitalized, end of period	$ 6,647,153	$ 6,647,153