Business Combination (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Net interest income and noninterest income for the acquired business
Provision for loan losses on purchased loans:	$ (928)		$ (592)	$ (2,254)		$ (902)
NCB [Member]
Net interest income and noninterest income for the acquired business
Interest income: Interest and fees on loans	608	[1]		1,768	[1],[2]
Interest income: Interest and fees on loan	250	[3]		1,712	[2],[3]
Interest income: Securities and other interest earning assets	29			87	[2]
Interest expense: Deposits	(62)			(219)	[2]
Provision for loan losses on purchased loans:	(808)			(1,058)	[2]
Noninterest income:	14			486	[2]
Noninterest expense:	(117)			(1,341)	[2]
Net effect, pre-tax	(86)			1,435	[2]
Valley [Member]
Net interest income and noninterest income for the acquired business
Interest income: Interest and fees on loans	1,290	[1],[2]		1,290	[1],[2]
Interest income: Interest and fees on loan	399	[2],[3]		399	[2],[3]
Interest income: Securities and other interest earning assets	150	[2]		150	[2]
Interest expense: Deposits	(66)	[2]		(66)	[2]
Provision for loan losses on purchased loans:	0	[2]		0	[2]
Noninterest income:	267	[2]		267	[2]
Noninterest expense:	(829)	[2]		(829)	[2]
Net effect, pre-tax	1,211	[2]		1,211	[2]
NCB and Valley [Member]
Net interest income and noninterest income for the acquired business
Interest income: Interest and fees on loans	1,898	[1],[2]		3,058	[1],[2]
Interest income: Interest and fees on loan	649	[2],[3]		2,111	[2],[3]
Interest income: Securities and other interest earning assets	179	[2]		237	[2]
Interest expense: Deposits	(128)	[2]		(285)	[2]
Provision for loan losses on purchased loans:	(808)	[2]		(1,058)	[2]
Noninterest income:	281	[2]		753	[2]
Noninterest expense:	(946)	[2]		(2,170)	[2]
Net effect, pre-tax	$ 1,125	[2]		$ 2,646	[2]

[1] Includes the contractual interest income on the purchased other loans.

[2] NCB was effective January 9, 2013 and Valley was effective July 15, 2013.

[3] Includes the accretion of the accretable yield on the purchased impaired loans and the accretion of the discount on the purchased other loans.