Fair Value Measurements (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired loans	8	6
Allowance related to impaired loans	$ 6,112	$ 5,585
Impaired loans, charge-offs		2,900
Inventory and Equipment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	50.00%
Accounts Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	20.00%
Foreclosed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	15.00%
Minimum [Member] | Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	15.00%
Maximum [Member] | Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	35.00%
Weighted average [Member] | Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, collateral, discount rate	21.00%	21.00%
Fair value measurements, nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	7,063	5,707
Impaired loans net of partial charge-offs	4,212	10,428
Foreclosed assets, carrying value		1,938
Fair value inputs, Level 3 [Member] | Fair value measurements, nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	7,063	5,707
Allowance related to impaired loans	6,100	5,600
Impaired loans net of partial charge-offs	4,212	10,428
Impaired loans, charge-offs	1,008
Foreclosed assets, carrying value		$ 1,938