Interest Rate Swaps (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Summary information about interest-rate swaps
Weighted average pay rate on interest-rate swaps	4.05%	4.28%
Weighted average receive rate on interest-rate swaps	2.67%	2.82%
Weighted average maturity (years)	5 years 4 months 24 days	6 years 3 months 18 days
Fair value of combined interest-rate swaps	$ 365	$ 275
Interest rate swaps
Summary information about interest-rate swaps
Notional amounts	$ 25,238	$ 25,195