Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financial assets measured at fair value on recurring basis [Abstract]
Collateralized mortgage obligations Issued or guaranteed by U.S. government agencies	$ 252,159
Collateralized mortgage obligations Non-agency	998
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Total investment securities available-for-sale	3,375
Financial assets measured at fair value on nonrecurring basis [Abstract]
Loans and leases held for sale	0
Significant Other Observable Inputs Level 2 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Total investment securities available-for-sale	335,815
Financial assets measured at fair value on nonrecurring basis [Abstract]
Loans and leases held for sale	0
Significant Unobservable Inputs Level 3 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Total investment securities available-for-sale	17,900
Financial assets measured at fair value on nonrecurring basis [Abstract]
Loans and leases held for sale	3,574
Recurring [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Mortgage-backed securities - residential	36,865	17,005
U.S. government agencies	35,186	36,084
Common stock	45	248
Collateralized mortgage obligations Issued or guaranteed by U.S. government agencies	252,159	234,034
Collateralized mortgage obligations Non-agency	998	4,832
Corporate bonds	7,014	12,975
Municipal bonds	3,593	965
Trust preferred securities	15,312	15,945
Other securities	5,918	6,918
Total investment securities available-for-sale	357,090	329,006
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Mortgage-backed securities - residential	0	0
U.S. government agencies	0	0
Common stock	45	248
Collateralized mortgage obligations Issued or guaranteed by U.S. government agencies	0	0
Collateralized mortgage obligations Non-agency	0	0
Corporate bonds	0	0
Municipal bonds	0	0
Trust preferred securities	3,330	3,342
Other securities	0	0
Total investment securities available-for-sale	3,375	3,590
Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Mortgage-backed securities - residential	36,865	17,005
U.S. government agencies	35,186	36,084
Common stock	0	0
Collateralized mortgage obligations Issued or guaranteed by U.S. government agencies	252,159	234,034
Collateralized mortgage obligations Non-agency	998	4,832
Corporate bonds	7,014	12,975
Municipal bonds	3,593	965
Trust preferred securities	0	0
Other securities	0	0
Total investment securities available-for-sale	335,815	305,895
Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Financial assets measured at fair value on recurring basis [Abstract]
Mortgage-backed securities - residential	0	0
U.S. government agencies	0	0
Common stock	0	0
Collateralized mortgage obligations Issued or guaranteed by U.S. government agencies	0	0
Collateralized mortgage obligations Non-agency	0	0
Corporate bonds	0	0
Municipal bonds	0	0
Trust preferred securities	11,982	12,603
Other securities	5,918	6,918
Total investment securities available-for-sale	17,900	19,521
Nonrecurring [Member]
Financial assets measured at fair value on nonrecurring basis [Abstract]
Impaired loans and leases	4,894	8,583
Other real estate owned	12,293	21,016
Loans and leases held for sale		3,830
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial assets measured at fair value on nonrecurring basis [Abstract]
Impaired loans and leases	0	0
Other real estate owned	0	0
Loans and leases held for sale		0
Nonrecurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Financial assets measured at fair value on nonrecurring basis [Abstract]
Impaired loans and leases	0	0
Other real estate owned	0	0
Loans and leases held for sale		0
Nonrecurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Financial assets measured at fair value on nonrecurring basis [Abstract]
Impaired loans and leases	4,894	8,583
Other real estate owned	12,293	21,016
Loans and leases held for sale		$ 3,830