Derivative Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2008
Derivative Instruments [Abstract]
Floating-rate subordinated note			$ 25,000,000
Interest rate swap's fair value included in other liabilities	(700,000)
Variable rate on subordinated note	2.47%
Basis for determining variable rate on subordinated note	3-month LIBOR plus 200 basis points
Fixed rate on interest rate swap paid by Park	6.01%
Fixed rate on the interest rate swap	4.01%
Basis for determining variable rate on interest rate swap	4.01% fixed rate on the interest rate swap plus 200 basis points
Change in fair value of interest rate swap, Net-of-tax amount	113,000	133,000
Unrealized net holding gain (loss) on cash flow hedge, Tax expense (benefit)	60,000	71,000
Mortgage loan interest rate lock commitments outstanding	16,000,000
Fair value of the derivative instruments	169,000
Fair value of the swap liability	$ 135,000