Share and Unit-Based Plans - SARs (Details)	3 Months Ended
	Mar. 31, 2017 $ / shares shares
SARs
Units
Balance at beginning of period (in shares) | shares	284,146
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Balance at end of period (in shares) | shares	284,146
Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 53.85
Granted (in dollars per share) | $ / shares	0.00
Vested (in dollars per share) | $ / shares	0.00
Balance at end of period (in dollars per share) | $ / shares	$ 53.85
Stock Options
Units
Balance at beginning of period (in shares) | shares	10,565
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Balance at end of period (in shares) | shares	10,565
Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 56.77
Granted (in dollars per share) | $ / shares	0.00
Exercised (in dollars per share) | $ / shares	0.00
Balance at end of period (in dollars per share) | $ / shares	$ 56.77