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Employee benefit plans - Salaries and Employee Benefits Expense - Profit Sharing (Details) - Retirement Profit Sharing Plan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Profit Sharing plan
Company contribution		$ 2,700
Safe harbor contribution	$ 18
Discretionary contributions	92
Future annual premium	$ 0

X

- Definition

The future annual premium due to the current funding status of the pension.

+ References

No definition available.

+ Details

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X

- Definition

Amount of safe harbor contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

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X

- Definition

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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- Details

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