Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Market Approach Valuation Technique [Member] | Loan and Leases Receivable, Impaired Loans [Member] | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	0.00%	(6.00%)
Market Approach Valuation Technique [Member] | Loan and Leases Receivable, Impaired Loans [Member] | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(51.00%)	(66.00%)
Market Approach Valuation Technique [Member] | Loan and Leases Receivable, Impaired Loans [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(19.00%)	(31.00%)
Market Approach Valuation Technique [Member] | Real Estate Acquired in Satisfaction of Debt [Member] | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	0.00%	(6.00%)
Market Approach Valuation Technique [Member] | Real Estate Acquired in Satisfaction of Debt [Member] | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(50.00%)	(55.00%)
Market Approach Valuation Technique [Member] | Real Estate Acquired in Satisfaction of Debt [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(15.00%)	(15.00%)
Market Approach Valuation Technique [Member] | Assets Held-for-sale [Member] | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	0.00%	0.00%
Market Approach Valuation Technique [Member] | Assets Held-for-sale [Member] | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(9.00%)	(9.00%)
Market Approach Valuation Technique [Member] | Assets Held-for-sale [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Inputs, Discount Rate	(5.00%)	(6.00%)
Estimated Fair Value | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	30,494	57,302
Real Estate Acquired Through Foreclosure, Fair Value Disclosure	4,554	8,502
Long-lived assets to be disposed, fair value disclosure	1,083	1,186
Estimate of Fair Value, Fair Value Disclosure, Gain (Loss) | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	(14,552)	(23,224)
Real Estate Acquired Through Foreclosure, Fair Value Disclosure	(12,665)	(14,441)
Long-lived assets to be disposed, fair value disclosure	(702)	(599)
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	30,494	57,302
Real Estate Acquired Through Foreclosure, Fair Value Disclosure	4,554	8,502
Long-lived assets to be disposed, fair value disclosure	1,083	1,186
Significant Unobservable Inputs (Level 3) | Estimated Fair Value | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	30,494	57,302
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	0	0
Real Estate Acquired Through Foreclosure, Fair Value Disclosure	0	0
Long-lived assets to be disposed, fair value disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans Receivable, Impaired, Fair Value Disclosure	0	0
Real Estate Acquired Through Foreclosure, Fair Value Disclosure	0	0
Long-lived assets to be disposed, fair value disclosure	0	0