Securities Sold Under Agreements to Repurchase (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Repurchase Agreements [Abstract]

Summary of repurchase agreements

	December 31, 2013
(Dollars in thousands)	Repurchase Amount		Weighted- Average Fixed Rate		Amortized Cost of Underlying Assets		Fair Value of Underlying Assets
Overnight	$	303,709	0.28	%	$	304,263	312,856
Maturing within 30 days	9,685		0.32	%	11,095		11,301
	$	313,394	0.28	%	$	315,358	324,157

	December 31, 2012
(Dollars in thousands)	Repurchase Amount		Weighted- Average Fixed Rate		Amortized Cost of Underlying Assets		Fair Value of Underlying Assets
Overnight	$	285,349	0.32	%	$	287,597	293,958
Maturing within 30 days	4,159		0.50	%	4,228		4,306
	$	289,508	0.32	%	$	291,825	298,264