Stock Compensation Plans - Schedule of Stock Option Activity and Weighted Average Exercise Prices (Details) - Employee Stock Option $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Options
Outstanding at January 1, 2016 (in shares) | shares	1,178,585
Granted (in shares) | shares	264,215
Forfeited (in shares) | shares	(217,688)
Exercised (in shares) | shares	(111,624)
Unearned performance-based options (in shares) | shares	(23,328)
Outstanding at December 31, 2016 (in shares) | shares	1,090,160
Options exercisable at December 31, 2016 | shares	823,512
Weighted- Average Exercise Price
Outstanding at January 1, 2016 (in dollars per share) | $ / shares	$ 48.14
Granted (in dollars per share) | $ / shares	34.71
Forfeited (in dollars per share) | $ / shares	46.57
Exercised (in dollars per share) | $ / shares	18.10
Unearned performance-based options (in dollars per share) | $ / shares	59.97
Outstanding at December 31, 2016 (in dollars per share) | $ / shares	48.02
Options exercisable at December 31, 2016 (in dollars per share) | $ / shares	$ 40.75
Weighted-Average Remaining Contractual Term (Years)
Weighted-average remaining contractual term in years outstanding at December 31, 2016	4 years 4 months 24 days
Weighted-average remaining contractual term in years options exercisable at December 31, 2016	2 years 3 months 18 days
Aggregate Intrinsic Value as of December 31, 2016
Aggregate intrinsic value outstanding at December 31, 2016 | $	$ 1,010
Aggregate intrinsic value of options exercisable at December 31, 2016 | $	$ 367