Share-Based Compensation - Summary of Stock Option Activity (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Number of Options:
Outstanding at beginning of period (shares) | shares	685
Granted (shares) | shares	0
Exercised (shares) | shares	0
Forfeited (shares) | shares	0
Expired (Shares) | shares	(17)
Outstanding at end of period (shares) | shares	668
Exercisable at end of period (shares) | shares	668
Weighted Average Exercise Price (in dollars per share):
Outstanding at beginning of period (dollars per share) | $ / shares	$ 34.90
Granted (dollars per share) | $ / shares	0.00
Exercised (dollars per share) | $ / shares	0.00
Forfeited (dollars per share) | $ / shares	0.00
Expired (dollars per share) | $ / shares	27.25
Outstanding at end of period (dollars per share) | $ / shares	35.10
Exercisable at end of period (dollars per share) | $ / shares	$ 35.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual life, outstanding	3 years 9 months 18 days
Weighted average remaining contractual life, outstanding, exercisable	3 years 9 months 18 days
Aggregate intrinsic value, exercised in period | $	$ 0
Aggregate intrinsic value, outstanding | $	(17,325)
Aggregate intrinsic value, exercisable | $	$ (17,325)