Derivatives (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accumulated OCI gain net of tax	$ 7,587,000	[1]	$ 19,026,000	[1]
Expected earnings transfer	$ 7,600,000
Period over which gain included in AOCI will be transferred to earnings, months	0 years 12 months
Expected derivative maturity date	Dec. 31, 2013

[1] Net of taxes.