Mortgage Servicing Rights and Mortgage Servicing Activity (Estimated Amortization Expense for Mortgage Servicing Rights) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Transfers and Servicing [Abstract]
2015	$ 3,562
2016	3,128
2017	2,610
2018	2,189
2019	1,836
more than 5 years	7,731
Total estimated future amortization	$ 21,056

Future Amortization of Mortgage Servicing Rights (MSRs)

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Future Amortization of Mortgage Servicing Rights (MSRs), After Five Years

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Future Amortization of Mortgage Servicing Rights (MSRs), Year Five

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Future Amortization of Mortgage Servicing Rights (MSRs), Year Four

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Future Amortization of Mortgage Servicing Rights (MSRs), Year One

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Future Amortization of Mortgage Servicing Rights (MSRs), Year Three

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Future Amortization of Mortgage Servicing Rights (MSRs), Year Two

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