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Bank subsidiary (Details 5) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | $ 522,280 | $ 535,090
Gross unrealized gains | 5,258 | 6,911
Gross unrealized losses | (10,004) | (12,994)
Available-for-sale securities | 517,534 | 529,007
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 274,367 | 313,800
Gross unrealized losses, less than 12 months | (7,315) | (11,353)
Fair value, 12 months or longer | 53,949 | 19,655
Gross unrealized losses, 12 months or longer | (2,689) | (1,641)
Federal agency obligations |  |
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | 87,916 | 83,193
Gross unrealized gains | 489 | 174
Gross unrealized losses | (1,885) | (2,394)
Available-for-sale securities | 86,520 | 80,973
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 44,700 | 70,779
Gross unrealized losses, less than 12 months | (1,508) | (2,394)
Fair value, 12 months or longer | 4,402 | 0
Gross unrealized losses, 12 months or longer | (377) | 0
Mortgage-related securities - FNMA, FHLMC and GNMA |  |
Available-for-sale securities |  |
Total available-for-sale securities, Amortized cost | 434,364 | 374,993
Gross unrealized gains | 4,769 | 4,911
Gross unrealized losses | (8,119) | (10,460)
Available-for-sale securities | 431,014 | 369,444
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Fair value, less than 12 months | 229,667 | 228,543
Gross unrealized losses, less than 12 months | (5,807) | (8,819)
Fair value, 12 months or longer | 49,547 | 19,655
Gross unrealized losses, 12 months or longer | (2,312) | (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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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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