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Short-term Borrowings (Tables)

12 Months Ended

Dec. 31, 2015

Short-term Debt [Abstract]

Summary of Short-Term Borrowings

Short-term borrowings at December 31 were as follows:

	2015											2014											2013
	Ending Balance				Average Balance				Average Rate			Ending Balance				Average Balance				Average Rate			Ending Balance				Average Balance				Average Rate
	(dollars in thousands)
Federal funds purchased	$	4,000			$	14,832			0.36	%		$	9,000			$	11,691			0.36	%		$	16,000			$	11,982			0.36	%
Borrowings from FHLB	1,400,000				1,117,522				0.42			945,000				644,651				0.31			478,100				335,449				0.27
Securities sold under agreements to repurchase	106,825				120,177				0.23			151,876				159,051				0.24			132,515				130,957				0.25
Total	$	1,510,825			$	1,252,531			0.40			$	1,105,876			$	815,393			0.30			$	626,615			$	478,388			0.26
Maximum total at any month-end	$	1,510,825										$	1,105,876										$	626,615
Weighted average rate at year-end									0.53	%										0.30	%										0.27	%

Interest Expense on Short-Term Borrowings

Interest expense on short-term borrowings for the years ended December 31 is detailed below:

	2015				2014				2013
	(dollars in thousands)
Federal funds purchased	$	54			$	42			$	43
Borrowings from FHLB	4,684				2,019				893
Securities sold under agreements to repurchase	280				388				326
Total interest on short-term borrowings	$	5,018			$	2,449			$	1,262

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Short Term Interest Expense Table [Text Block]

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Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Article 5

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