Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Amortized Cost:
Fair value of MSRs	$ 44,000		$ 44,000		$ 50,200
Residential Mortgage [Member]
Amortized Cost:
Balance at beginning of period	38,826	$ 37,894	38,573	$ 37,663
Originations of mortgage servicing rights	2,499	2,018	5,585	5,247
Amortization	(1,970)	(1,684)	(4,803)	(4,682)
Balance at end of period	$ 39,355	$ 38,228	$ 39,355	$ 38,228

Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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- Definition

Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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- Definition

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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