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Fair Value Option and Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified | 6 Months Ended |  |  |  |  | 6 Months Ended
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Jun. 30, 2014 Interest rate swap agreements net of swap credit valuation | Jun. 30, 2013 Interest rate swap agreements net of swap credit valuation | Jun. 30, 2013 Collateralized mortgage obligation | Jun. 30, 2014 Asset-backed securities | Jun. 30, 2013 Asset-backed securities | Jun. 30, 2014 States and political subdivisions | Dec. 31, 2013 States and political subdivisions | Jun. 30, 2013 States and political subdivisions | Dec. 31, 2012 States and political subdivisions | Jun. 30, 2014 Mortgage Servicing rights | Jun. 30, 2013 Mortgage Servicing rights
Changes in Level 3 |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period | $ 6 | $ (47) | $ 9,957 | $ 154,137 |  | $ 125 | $ 125 | $ 132 | $ 132 | $ 5,807 | $ 4,116
Total gains or losses |  |  |  |  |  |  |  |  |  |  |
Included in earnings (or changes in net assets) | (6) | 24 | 115 | 1,671 | 276 |  |  |  |  | (630) | 239
Included in other comprehensive income |  |  | 1,182 | 513 | (1,450) |  |  |  |  |  |
Purchases, issuances, sales, and settlements |  |  |  |  |  |  |  |  |  |  |
Purchases |  |  |  | 58,047 | 164,533 |  |  |  |  |  |
Issuances |  |  |  |  |  |  |  |  |  | 324 | 946
Settlements |  |  | (910) |  |  |  |  |  |  |  |
Sales |  |  |  | (77,282) | (11,591) |  |  |  |  |  |
Balance at the end of the period |  | $ (23) | $ 10,344 | $ 137,086 | $ 151,768 | $ 125 | $ 125 | $ 132 | $ 132 | $ 5,501 | $ 5,301

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