Fair Value (Details 4) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets:
Mortgage servicing assets	$ 4,920	$ 3,921
Permanent Real Estate Loans [Member]
Assets:
Impaired loans	6,166	38,627
Other real estate owned, net:	3,172	7,586
Construction Loans [Member]
Assets:
Impaired loans	3,489	14,953
Other real estate owned, net:	6,918	7,581
Consumer loans [Member]
Assets:
Impaired loans		282
Commercial loans [Member]
Assets:
Impaired loans	257	291
Fair Value Measurements (Level 1) [Member]
Assets:
Mortgage servicing assets
Fair Value Measurements (Level 1) [Member] | Permanent Real Estate Loans [Member]
Assets:
Impaired loans
Other real estate owned, net:
Fair Value Measurements (Level 1) [Member] | Construction Loans [Member]
Assets:
Impaired loans
Other real estate owned, net:
Fair Value Measurements (Level 1) [Member] | Commercial loans [Member]
Assets:
Impaired loans
Fair Value Measurements (Level 2) [Member]
Assets:
Mortgage servicing assets	4,920	3,921
Fair Value Measurements (Level 2) [Member] | Permanent Real Estate Loans [Member]
Assets:
Impaired loans
Other real estate owned, net:
Fair Value Measurements (Level 2) [Member] | Construction Loans [Member]
Assets:
Impaired loans
Other real estate owned, net:
Fair Value Measurements (Level 2) [Member] | Commercial loans [Member]
Assets:
Impaired loans
Fair Value Measurements (Level 3) [Member]
Assets:
Mortgage servicing assets
Fair Value Measurements (Level 3) [Member] | Permanent Real Estate Loans [Member]
Assets:
Impaired loans	6,166	38,627
Other real estate owned, net:	3,172	7,586
Fair Value Measurements (Level 3) [Member] | Construction Loans [Member]
Assets:
Impaired loans	3,489	14,953
Other real estate owned, net:	6,918	7,581
Fair Value Measurements (Level 3) [Member] | Consumer loans [Member]
Assets:
Impaired loans		282
Fair Value Measurements (Level 3) [Member] | Commercial loans [Member]
Assets:
Impaired loans	$ 257	$ 291