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Fair value measurements Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | $ 550,394 | $ 529,007
Mortgage-related securities-FNMA, FHLMC and GNMA |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 430,834 | 369,444
U.S. Treasury and federal agency obligations |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 119,560 |
Municipal bonds |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value |  | 78,590
Fair value measurements on a recurring basis | Level 1 |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets |  | 98
Derivative liabilities | 71 |
Fair value measurements on a recurring basis | Level 1 | Interest Rate Lock Commitments |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets |  | 0
Derivative liabilities | 0 |
Fair value measurements on a recurring basis | Level 1 | Forward Contracts |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets |  | 98
Derivative liabilities | 71 |
Fair value measurements on a recurring basis | Level 2 |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets | 398 | 531
Derivative liabilities | 43 | 26
Fair value measurements on a recurring basis | Level 2 | Interest Rate Lock Commitments |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets | 393 | 488
Derivative liabilities | 3 | 24
Fair value measurements on a recurring basis | Level 2 | Forward Contracts |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Derivative assets | 5 | 43
Derivative liabilities | 40 | 2
Fair value measurements on a recurring basis | Level 2 | Bank |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 550,394 | 529,007
Fair value measurements on a recurring basis | Level 2 | Bank | Mortgage-related securities-FNMA, FHLMC and GNMA |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 430,834 | 369,444
Fair value measurements on a recurring basis | Level 2 | Bank | U.S. Treasury and federal agency obligations |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 119,560 | 80,973
Fair value measurements on a recurring basis | Level 2 | Bank | Municipal bonds |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Available-for-sale investment securities, at fair value | 0 | 78,590
Fair value measurements on a recurring basis | Level 2 | Other |  |
Fair value measurements on a recurring and nonrecurring basis |  |
Money market funds | $ 10 | $ 10

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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