Short-Term Borrowings and Long-Term Debt (Schedule of Maturities of Long-term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Due in 2014	$ 750
Due in 2015	19,000
Due in 2017	20,000
Due in 2018	10,000
Thereafter	20,726
Long-term debt, total	70,476	60,527
Fixed Rate [Member]
Debt Instrument [Line Items]
Due in 2014	750
Due in 2015	19,000
Due in 2017	20,000
Thereafter	10,726
Long-term debt, total	50,476
Fixed Rate Convertible [Member]
Debt Instrument [Line Items]
Due in 2018	10,000
Long-term debt, total	10,000
Variable Rate [Member]
Debt Instrument [Line Items]
Thereafter	10,000
Long-term debt, total	$ 10,000