Stock Repurchase Program (Details) (USD $)	3 Months Ended	9 Months Ended		110 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Jul. 26, 2005
Equity [Abstract]
Maximum number of share authorized to repurchase under the program (in shares)					750,000
Common stock purchased during the period (in shares)	23,853	44,082	13,601	391,351
Average price per share (in dollars per share)	$ 78.78