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Bank segment (Details 4) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | $ 534,876 | $ 535,090
Gross unrealized gains | 5,958 | 6,911
Gross unrealized losses | (9,231) | (12,994)
Available-for-sale securities | 531,603 | 529,007
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 119,030 | 313,820
Gross unrealized losses, less than 12 months | (1,047) | (11,353)
Fair value, 12 months or longer | 177,712 | 19,655
Gross unrealized losses, 12 months or longer | (8,184) | (1,641)
Federal agency obligations |  |
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | 107,072 | 83,193
Gross unrealized gains | 631 | 174
Gross unrealized losses | (1,407) | (2,394)
Available-for-sale securities | 106,296 | 80,973
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 29,628 | 70,799
Gross unrealized losses, less than 12 months | (137) | (2,394)
Fair value, 12 months or longer | 29,168 | 0
Gross unrealized losses, 12 months or longer | (1,270) | 0
Mortgage-related securities - FNMA, FHLMC and GNMA |  |
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | 427,804 | 374,993
Gross unrealized gains | 5,327 | 4,911
Gross unrealized losses | (7,824) | (10,460)
Available-for-sale securities | 425,307 | 369,444
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 89,402 | 228,543
Gross unrealized losses, less than 12 months | (910) | (8,819)
Fair value, 12 months or longer | 148,544 | 19,655
Gross unrealized losses, 12 months or longer | (6,914) | (1,641)
Municipal bonds |  |
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | 0 | 76,904
Gross unrealized gains | 0 | 1,826
Gross unrealized losses | 0 | (140)
Available-for-sale securities | 0 | 78,590
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 0 | 14,478
Gross unrealized losses, less than 12 months | 0 | (140)
Fair value, 12 months or longer | 0 | 0
Gross unrealized losses, 12 months or longer | $ 0 | $ 0

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