Derivative Instruments and Hedging Activities (Offsetting Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Offsetting Assets [Line Items]
Gross Amounts of Recognized Liabilities	$ 0
Gross Amounts Offset in the Statement of Financial Position	2,813
Net Amounts of Liabilities Presented in the Statement of Financial Position	2,813
Financial Instruments	(2,813)
Cash Collateral Pledged	0
Net Amount	0
Counterparty 1 [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Liabilities	0
Gross Amounts Offset in the Statement of Financial Position	2,813
Net Amounts of Liabilities Presented in the Statement of Financial Position	2,813
Financial Instruments	(2,813)
Cash Collateral Pledged	0
Net Amount	$ 0