Fair Value of Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	$ 237,540
Obligations of U.S. government agencies
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	4,804
Mortgage-backed securities - Agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	145,977
Mortgage-backed securities - Non-agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	20,415
Obligations of state and municipal securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	34,393
Asset backed securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	31,951
Significant Other Observable Inputs (Level 2)
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	237,540	287,682
Significant Unobservable Inputs (Level 3)
Financial instruments of the Company measured at fair value on a recurring basis
Number of Instruments Held	0	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	237,540	287,682
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of U.S. government agencies
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	4,804	7,567
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - Agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	145,977	145,768
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - Non-agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	20,415	44,795
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of state and municipal securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	34,393	68,968
Recurring basis | Significant Other Observable Inputs (Level 2) | Asset backed securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	31,951	20,584
Recurring basis | Assets At Fair Value
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	237,540	287,682
Recurring basis | Assets At Fair Value | Obligations of U.S. government agencies
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	4,804	7,567
Recurring basis | Assets At Fair Value | Mortgage-backed securities - Agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	145,977	145,768
Recurring basis | Assets At Fair Value | Mortgage-backed securities - Non-agency
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	20,415	44,795
Recurring basis | Assets At Fair Value | Obligations of state and municipal securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	34,393	68,968
Recurring basis | Assets At Fair Value | Asset backed securities
Financial instruments of the Company measured at fair value on a recurring basis
Total assets measured on recurring basis	$ 31,951	$ 20,584