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Securities - Available-for-sale Securities in Continuous Loss Position (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) investment | Dec. 31, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value |  | $ 83,561
Less than 12 Months, Gross Unrealized Losses |  | (537)
12 Months or Greater, Fair Value |  | 16,325
12 Months or Greater, Gross Unrealized Losses |  | (509)
Total, Fair Value |  | 99,886
Total, Gross Unrealized Losses |  | (1,046)
U.S. Government-sponsored enterprises (GSEs) [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value |  | 8,464
Less than 12 Months, Gross Unrealized Losses |  | (50)
12 Months or Greater, Fair Value |  | 0
12 Months or Greater, Gross Unrealized Losses |  | 0
Total, Fair Value |  | 8,464
Total, Gross Unrealized Losses |  | (50)
Municipal securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value |  | 2,456
Less than 12 Months, Gross Unrealized Losses |  | (17)
12 Months or Greater, Fair Value |  | 0
12 Months or Greater, Gross Unrealized Losses |  | 0
Total, Fair Value |  | 2,456
Total, Gross Unrealized Losses |  | (17)
Mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | $ 38,714 | 72,641
Less than 12 Months, Gross Unrealized Losses | (333) | (470)
12 Months or Greater, Fair Value | 12,894 | 16,325
12 Months or Greater, Gross Unrealized Losses | (216) | (509)
Total, Fair Value | 51,608 | 88,966
Total, Gross Unrealized Losses | $ (549) | $ (979)
Number of investments in unrealized loss positions | investment | 10 |

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- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of unrealized loss on securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
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