Investment Securities (Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	$ 213,832	$ 80,829
12 Months or Longer	0	12,402
Total	213,832	93,231
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses
Less than 12 Months	(1,714)	(2,488)
12 Months or Longer	0	(638)
Total	(1,714)	(3,126)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	5,307	16,047
12 Months or Longer	0	124
Total	5,307	16,171
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrecognized Losses
Less than 12 Months	(189)	(473)
12 Months or Longer	0	(23)
Total	(189)	(496)
U.S. Treasury and U.S. Government-sponsored agencies
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	3,567	3,031
12 Months or Longer	0	0
Total	3,567	3,031
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses
Less than 12 Months	(31)	(62)
12 Months or Longer	0	0
Total	(31)	(62)
Municipal securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	25,176	21,471
12 Months or Longer	0	4,644
Total	25,176	26,115
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses
Less than 12 Months	(184)	(1,242)
12 Months or Longer	0	(493)
Total	(184)	(1,735)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	2,196	10,967
12 Months or Longer	0	0
Total	2,196	10,967
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrecognized Losses
Less than 12 Months	(11)	(184)
12 Months or Longer	0	0
Total	(11)	(184)
U.S. Government-sponsored agencies
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	182,970	56,327
12 Months or Longer	0	7,758
Total	182,970	64,085
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses
Less than 12 Months	(1,475)	(1,184)
12 Months or Longer	0	(145)
Total	(1,475)	(1,329)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	2,553	4,869
12 Months or Longer	0	0
Total	2,553	4,869
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrecognized Losses
Less than 12 Months	(74)	(284)
12 Months or Longer	0	0
Total	(74)	(284)
Corporate obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	2,119
12 Months or Longer	0
Total	2,119
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses
Less than 12 Months	(24)
12 Months or Longer	0
Total	(24)
Private residential collateralized mortgage obligations
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value
Less than 12 Months	558	211
12 Months or Longer	0	124
Total	558	335
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrecognized Losses
Less than 12 Months	(104)	(5)
12 Months or Longer	0	(23)
Total	$ (104)	$ (28)

Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss

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Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss

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Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ 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)(1)

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

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-Publisher FASB

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-Topic 320

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This item represents the fair value of securities categorized as held-to-maturity which are in an unrealized loss position.

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This item represents the fair value of securities categorized as held-to-maturity that have been in a continuous unrealized loss position for less than twelve months.

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