Contingencies - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 25, 2017	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Legal Matters and Other Contingencies [Line Items]
Loans and Leases Receivable				$ 2,890,981	$ 2,390,832
Software Lease [Member]
Legal Matters and Other Contingencies [Line Items]
Litigation Settlement, Settlement Agreement Date		September 25, 2017
Litigation Settlement, Amount Awarded from Other Party		$ 1,000
Litigation Settlement, Subject to Election, Payment Per Guarantor				43
Accounts receivable				2,300
Other Assets				1,000
Maximum [Member] | Software Lease [Member]
Legal Matters and Other Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party		$ 1,300
Litigation Settlement, Not Subject to Election, Payment Per Guarantor				228
Minimum [Member] | Software Lease [Member]
Legal Matters and Other Contingencies [Line Items]
Litigation Settlement, Not Subject to Election, Payment Per Guarantor				108
Non-Accrual [Member] | Software Lease [Member]
Legal Matters and Other Contingencies [Line Items]
Loans and Leases Receivable				$ 1,300
Scenario, Forecast [Member]
Legal Matters and Other Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party			$ 1,000
Scenario, Forecast [Member] | Software Lease [Member]
Legal Matters and Other Contingencies [Line Items]
Litigation Settlement, Election Process Completion, Date	Mar. 31, 2018