Stock-Based Compensation - Performance Shares and Stock Option Plans (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 22, 2016 $ / shares shares	Dec. 31, 2016 USD ($) plan $ / shares shares	Dec. 31, 2015 USD ($)	Mar. 01, 2016 shares
Employee and Directors Stock Options
Information relating to stock options
Number of plans | plan		2
Number of shares authorized		1,925,000
Expiration period		10 years
Vesting of awards per year (as a percent)		33.33%
Award vesting period		3 years
Fair value assumptions
Fair Value (in dollars per share) | $ / shares	$ 11.50
Dividend Yield (as a percent)	2.15%
Risk-Free Interest Rate (as a percent)	1.79%
Expected Volatility (as a percent)	37.00%
Expected Life	5 years
Stock-based employee compensation expense | $		$ 120	$ 133
Remaining unrecognized compensation expense | $		$ 1,141
Weighted average period for recognition		1 year 10 months 17 days
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)		428,401
Granted (in shares)	47,925	47,925
Exercised (in shares)		0
Canceled (in shares)		(3,000)
Outstanding at end of the period (in shares)		473,326
Vested or expected to vest (in shares)		439,469
Exercisable at end of period (in shares)		345,167
Outstanding at end of period, Aggregate Intrinsic Value | $		$ 990
Vested or expected to vest, Aggregate Intrinsic Value | $		930
Exercisable at end of the period, Aggregate Intrinsic Value | $		$ 609
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share) | $ / shares		$ 48.47
Granted (in dollars per share) | $ / shares	$ 40.86	40.86
Exercised (in dollars per share) | $ / shares		0.00
Canceled (in dollars per share) | $ / shares		54.00
Outstanding at end of period (in dollars per share) | $ / shares		47.67
Vested or expected to vest (in dollars per share) | $ / shares		47.89
Exercisable at end of the period (in dollars per share) | $ / shares		$ 50.21
Outstanding at end of the period, Weighted Average Remaining Contractual Life		5 years 8 months 23 days
Vested or expected to vest, Weighted Average Remaining Contractual Life		4 years 7 months 13 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life		4 years 5 months 27 days
Employee and Directors Stock Options | Stock Option Plan Adopted in August 2004
Information relating to stock options
Number of shares authorized		1,000,000
Employee and Directors Stock Options | Stock Option Plan Adopted in January 2007
Information relating to stock options
Number of shares authorized		500,000
Stock Options and Stock Appreciation Rights
Information relating to stock options
Number of shares authorized				425,000
Performance Shares | Certain Employees
Information relating to stock options
Number of shares authorized	19,000
Award vesting period	3 years
Fair value assumptions
Stock-based employee compensation expense | $		$ 23	$ 0
Remaining unrecognized compensation expense | $		$ 775
Weighted average period for recognition		2 years 9 months