Equity - Schedule of Stock Options, SARS, and Non-vested Restricted Stock (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Options and SARs
Ending balance (in shares)	98,836
Exercisable (in shares)				72,696
Non-vested Restricted Stock
Beginning balance (in shares)	80,153	95,015	138,497
Granted (in shares)	41,735	32,070	45,828
Canceled (in shares)	(17,054)	(1,098)	(28,815)
Vested and issued (in shares)	(42,237)	(45,834)	(60,495)
Ending balance (in shares)	62,597	80,153	95,015
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 60.98	$ 44.39	$ 34.63
Granted (in dollars per share)	80.51	84.03	59.79
Canceled (in dollars per share)	74.97	86.15	42.15
Vested and issued (in dollars per share)	52.65	42.12	34.77
Ending balance (in dollars per share)	$ 60.98	$ 44.39	$ 34.63	$ 75.81	$ 60.98	$ 44.39
Stock Appreciation Rights
Stock Options and SARs
Beginning balance (in shares)	124,960	163,272	367,535
Granted (in shares)	24,582	10,122	24,657
Exercised (in shares)	(40,851)	(48,434)	(111,278)
Canceled (in shares)	(9,855)	0	(117,642)
Ending balance (in shares)	98,836	124,960	163,272
Exercisable (in shares)				72,696	95,675	93,085
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 38.38	$ 32.95	$ 30.18
Granted (in dollars per share)	82.76	86.15	60.84
Exercised (in dollars per share)	35.61	30.06	31.47
Canceled (in dollars per share)	79.45	0	31.55
Ending balance (in dollars per share)	$ 46.47	$ 38.38	$ 32.95
Exercisable (in dollars per share)				$ 34.07	$ 31.41	$ 28.57