Loans and Asset Quality Information (Details 10) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Provisions	$ 5,591	$ 6,467	$ 16,740	$ 28,022
Loans receivable:
Ending balance - total	240,279	322,895	240,279	322,895	282,314
Covered
Beginning balance	5,028	6,372	4,759	5,808	5,808
Charge-offs	(541)	(1,714)	(5,650)	(4,148)	(10,728)
Recoveries
Provisions	1,548	1,273	6,926	4,271	9,679
Ending balance	6,035	5,931	6,035	5,931	4,759
Ending balances: Allowance for loan losses
Individually evaluated for impairment	5,583	5,931	5,583	5,931	4,459
Collectively evaluated for impairment	452		452		300
Loans acquired with deteriorated credit quality	17	17	17	17	17
Loans receivable:
Ending balance - total	240,279	322,895	240,279	322,895	282,314
Ending balances: Loans
Individually evaluated for impairment	74,690	42,598	74,690	42,598	74,914
Collectively evaluated for impairment	165,589	280,297	165,589	280,297	207,400
Loans acquired with deteriorated credit quality	$ 3,340	$ 4,819	$ 3,340	$ 4,819	$ 4,825