Investments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 security	Mar. 31, 2012	Dec. 31, 2012 security
Schedule of Investments [Line Items]
Payments to Acquire Available-for-sale Securities	$ 11,620,000	$ 6,495,000
Unrealized Gain (Loss) on Securities	2,700,000
Average Investment Portfolio Balance	136,500,000	126,900,000
Investment Portfolio average yield	2.21%	2.85%
Available-for-sale Securities	134,832,000		133,328,000
Amortized Cost	132,112,000		130,785,000
Securities pledged as collateral	129,000,000		119,800,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature	The investment portfolio contained 63 securities with $33.5 million of temporarily impaired fair value and $1.5 million in unrealized losses. The unrealized loss position is less than at year-end 2012, but the number of impaired securities is unchanged. The trust preferred sector continues to show the largest unrealized loss at $1.0 million on seven securities, a slight improvement from the prior-year end. For securities with an unrealized loss, Management applies a systematic methodology in order to perform an assessment of the potential for other-than-temporary impairment. In the case of debt securities, investments considered for other-than-temporary impairment: (1) had a specified maturity or repricing date; (2) were generally expected to be redeemed at par, and (3) were expected to achieve a recovery in market value within a reasonable period of time. In addition, the Bank considers whether it intends to sell these securities or whether it will be forced to sell these securities before the earlier of amortized cost recovery or maturity. Equity securities are assessed for other-than-temporary impairment based on the length of time of impairment, dollar amount of the impairment and general market and financial conditions relating to specific issues. The impairment identified on debt and equity securities and subject to assessment at March 31, 2013, was deemed to be temporary and required no further adjustments to the financial statements, unless otherwise noted. The following table reflects temporary impairment in the investment portfolio (excluding restricted stock), aggregated by investment category, length of time that individual securities have been in a continuous unrealized loss position and the number of securities in each category as of March 31, 2013 and December 31, 2012:
Gross Unrealized Losses	1,521,000		1,728,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	33,471,000		31,813,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	63		63
Other Than Temporary Impairment Losses, Investments Available-for-Sale Securities, Portion Recognized In Earnings, Net, Qualitative Disclosures Methodology	The PLMBS sector shows a gross unrealized loss of $37 thousand, an improvement over the $123 thousand unrealized loss at December 31, 2012. These bonds were all rated AAA at time of purchase, but have since experienced rating declines. Some have experienced increased delinquencies and defaults, while others have seen the credit support increase as the bonds paid-down. The Bank monitors the performance of the PLMBS investments on a regular basis and reviews delinquencies, default rates, credit support levels and various cash flow stress test scenarios. In determining the credit related loss, Management considers all principal past due 60 days or more as a loss. If additional principal moves beyond 60 days past due, it will also be considered a loss. As a result of the analysis on PLMBS it was determined that no impairment charge was required at quarter end. The Bank has recorded $490 thousand of cumulative impairment charges on this portfolio. Management continues to monitor these securities and it is possible that additional write-downs may occur if current loss trends continue. The Bank is currently participating in a class-action lawsuit against one PLMBS servicer that centers on defective warranties and representations made as part of the underwriting process. See the PLMBS table above for additional information.
Restricted stock	3,050,000		3,571,000
Net decrease in restricted stock	521,000	250,000
Equity securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	2,199,000		1,941,000
Amortized Cost	2,104,000		2,104,000
Gross Unrealized Losses	122,000		255,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	766,000		1,462,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	10		16
Municipal securities [Member]
Schedule of Investments [Line Items]
Percent of Investment Portfolio		69.00%
Number of States		27
Available-for-sale Securities	60,238,000		61,216,000
Amortized Cost	57,647,000		58,395,000
Gross Unrealized Losses	242,000		163,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	9,467,000		8,789,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	14		10
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	999,000		994,000
Amortized Cost	1,004,000		1,005,000
Gross Unrealized Losses	5,000		11,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	999,000		994,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1		1
Trust preferred securities [Member]
Schedule of Investments [Line Items]
Number of investments	7
Available-for-sale Securities	4,917,000		4,830,000
Amortized Cost	5,911,000		5,905,000
Gross Unrealized Gain (Loss)	994,000
Gross Unrealized Losses	994,000		1,075,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,917,000		4,830,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	7		7
Investment Maturity Year Range Start	2027
Investment Maturity Year Range End	2028
Agency mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	51,460,000		49,066,000
Amortized Cost	50,536,000		48,121,000
Gross Unrealized Losses	101,000		84,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	10,096,000		9,533,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	17		14
Private-label mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Number of investments	6
Available-for-sale Securities	2,399,000		2,426,000
Amortized Cost	2,407,000		2,539,000
Gross Unrealized Gain (Loss)	8,000
Gross Unrealized Losses	37,000		123,000
Cumulative OTTI Charges	490,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	932,000		1,875,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2		5
Non FHLB Stock [Member]
Schedule of Investments [Line Items]
Restricted stock	30,000
Restricted Stock - FHLB Pittsburgh [Member]
Schedule of Investments [Line Items]
Restricted Stock Cost	$ 100
Net decrease in restricted stock	521,000
Texas [Member] | Municipal securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities		9,800,000
Pennsylvania [Member] | Municipal securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities		6,500,000
Moody's, A Rating [Member] | Municipal securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	56,700,000
Moody's, Lower than A Rating [Member] | Municipal securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	637,000
No Agency Rating [Member] | Municipal securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities	$ 2,900,000
Moody's, A3 Rating [Member] | Corporate debt securities [Member]
Schedule of Investments [Line Items]
Number of investments	1