Investment Securities - Schedule Of Gross Unrealized Losses On Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 165,688	$ 134,224
More Than 12 Months, Fair Value	0	0
Total, Fair Value	165,688	134,224
Less Than 12 Months, Unrealized Losses	544	397
More Than 12 Months, Unrealized Losses	0	0
Total, Unrealized Losses	544	397
U.S. Treasury and government sponsored entities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	165,004	122,560
More Than 12 Months, Fair Value	0	0
Total, Fair Value	165,004	122,560
Less Than 12 Months, Unrealized Losses	539	323
More Than 12 Months, Unrealized Losses	0	0
Total, Unrealized Losses	539	323
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	567	5,613
More Than 12 Months, Fair Value	0	0
Total, Fair Value	567	5,613
Less Than 12 Months, Unrealized Losses	4	54
More Than 12 Months, Unrealized Losses	0	0
Total, Unrealized Losses	4	54
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	117	6,051
More Than 12 Months, Fair Value	0	0
Total, Fair Value	117	6,051
Less Than 12 Months, Unrealized Losses	1	20
More Than 12 Months, Unrealized Losses	0	0
Total, Unrealized Losses	$ 1	$ 20

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

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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.

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