Stock Repurchase Program (Details) - $ / shares	3 Months Ended		9 Months Ended		182 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Jul. 26, 2005
Equity [Abstract]
Maximum number of share authorized to repurchase under the program (in shares)						1,500,000
Common stock purchased during the period (in shares)	29,807	8,209	112,407	83,606	1,328,410
Average price per share (in dollars per share)	$ 60.86