Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Credit default swap, notional value	$ 33,100,000		$ 33,100,000
Fair value, level 1 to level 2 transfers, amount	0	0
Fair value, level 2 to level 1 transfers, amount	0	0
Assets measured at fair value on a nonrecurring basis	0	0
Liabilities measured at fair value on a nonrecurring basis	$ 0	$ 0