Stock-based Compensation (Details 2)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Restricted Stock Units [Member]
Nonvested Stock Units Beginning balance, Shares	3,601
Nonvested Stock Units Added	33
Nonvested Stock Units Forfeited	(40)
Nonvested Stock Units Vested	(479)
Nonvested Stock Units Ening balance, Shares	3,115
Weighted Average Award Date Fair Value Per Unit, Added | $ / shares	$ 635.04
Weighted Average Award Date Fair Value Per Unit, Vested | $ / shares	388.02
Weighted Average Award Date Fair Value Per Unit, Beginning balance | $ / shares	623.19
Weighted Average Award Date Fair Value Per Unit, Forfeited | $ / shares	766.48
Weighted Average Award Date Fair Value Per Unit, Ending balance | $ / shares	$ 657.70
Directors Stock Units [Member]
Nonvested Stock Units Beginning balance, Shares	0
Nonvested Stock Units Added	16
Nonvested Stock Units Forfeited	0
Nonvested Stock Units Vested	(16)
Nonvested Stock Units Ening balance, Shares	0
Weighted Average Award Date Fair Value Per Unit, Added | $ / shares	$ 711.75
Weighted Average Award Date Fair Value Per Unit, Vested | $ / shares	$ 711.75