Securities (Additional Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended						12 Months Ended
	Dec. 31, 2013 Securities	Dec. 31, 2012 Securities	Dec. 31, 2012 Private issue collateralized mortgage obligations [Member] Securities	Dec. 31, 2011 Private issue collateralized mortgage obligations [Member] Securities	Dec. 31, 2013 Private issue collateralized mortgage obligations [Member]	Dec. 31, 2012 Private issue collateralized mortgage obligations [Member] Noninvestment Grade [Member]	Dec. 31, 2011 Agency Securities [Member]	Dec. 31, 2011 Municipal bonds [Member] Securities	Dec. 31, 2011 Collateralized Mortgage Obligations [Member] Securities	Dec. 31, 2013 Collateralized Mortgage Obligations [Member]	Dec. 31, 2012 Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Unrealized gains on securities available-for-sale included in accumulated other comprehensive income, net of deferred taxes	$ (7,964)	$ 12,943			$ 407
Unrealized gains on securities available-for-sale included in accumulated other comprehensive income, deferred taxes	4,288	0
Net unrealized losses and gains on available-for-sale securities	0	6,969
Number of investment securities which had unrealized losses for twelve months or longer	93	11
Investment securities with unrealized losses that are considered temporary	509,203	124,054	8,174		5,067	7,500				312,654	73,098
Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	19,776	896	697		407					12,324	120
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	27
Investment securities with unrealized losses for twelve months or longer	122,236	8,174	8,174		4,945					73,376	0
Other Than Temporary Impairment, Number of Securities		2	1	2
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold			176	109
Other than temporary impairment losses	0		39
Number of securities sold				3			1	16	31
Proceeds from sale of investments				7,800			10,200	7,300	29,300
Carrying value of investments sold	16,800	113,000
Security pledged as collateral, amortized cost	479,200	465,000
Security pledged as collateral, fair value	$ 474,700	$ 482,400