Securities (Securities Available for Sale with Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value	$ 115,004	$ 1,047,869
Available for Sale, Losses less than 12 months, Gross Unrealized Losses	567	9,553
Available for Sale, Losses 12 months or longer, Fair Value	4,534	150,819
Available for Sale, Losses 12 months or longer, Gross Unrealized Losses	36	3,908
Available for Sale, Total, Fair Value	119,538	1,198,688
Available for Sale, Total, Gross Unrealized Losses	603	13,461
US Treasury and Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses 12 months or longer, Fair Value		82
Available for Sale, Losses 12 months or longer, Gross Unrealized Losses		1
Available for Sale, Total, Fair Value		82
Available for Sale, Total, Gross Unrealized Losses		1
Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value	69,801	8,296
Available for Sale, Losses less than 12 months, Gross Unrealized Losses	409	38
Available for Sale, Total, Fair Value	69,801	8,296
Available for Sale, Total, Gross Unrealized Losses	409	38
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value	6,653	831,156
Available for Sale, Losses less than 12 months, Gross Unrealized Losses	55	8,257
Available for Sale, Losses 12 months or longer, Fair Value	4,534	116,126
Available for Sale, Losses 12 months or longer, Gross Unrealized Losses	36	2,925
Available for Sale, Total, Fair Value	11,187	947,282
Available for Sale, Total, Gross Unrealized Losses	91	11,182
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value	31,640
Available for Sale, Losses less than 12 months, Gross Unrealized Losses	103
Available for Sale, Total, Fair Value	31,640
Available for Sale, Total, Gross Unrealized Losses	103
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value	6,910	208,397
Available for Sale, Losses less than 12 months, Gross Unrealized Losses		1,257
Available for Sale, Losses 12 months or longer, Fair Value		33,138
Available for Sale, Losses 12 months or longer, Gross Unrealized Losses		935
Available for Sale, Total, Fair Value	$ 6,910	241,535
Available for Sale, Total, Gross Unrealized Losses		2,192
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Losses less than 12 months, Fair Value		20
Available for Sale, Losses less than 12 months, Gross Unrealized Losses		1
Available for Sale, Losses 12 months or longer, Fair Value		1,473
Available for Sale, Losses 12 months or longer, Gross Unrealized Losses		47
Available for Sale, Total, Fair Value		1,493
Available for Sale, Total, Gross Unrealized Losses		$ 48

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.

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)(2)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563

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