Fair Value Measurements Fair Value Measurements (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Tax, Portion Attributable to Parent	$ 0	$ 0	$ (1,115,000)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	0	0	1,115,000
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0
Threshold for loans that are considered individually significant for allowance analysis purposes	250,000
Non-PCI nonaccrual loans	83,621,000	46,774,000
Non-PCI nonaccrual loans write downs based on collateral values	$ 4,400,000