Basis of Presentation - Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014		Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effect on income before income taxes	$ (197)	[1]	$ (327)	[1]	$ (373)	[1]	$ (758)	[1]
Effect on income taxes	119		41		159		100
Effect on net income	$ (78)		$ (286)		$ (214)		$ (658)
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Outstanding (in shares)					69,154		127,975
Released (in shares)					(30,828)		(55,646)
Forfeited (in shares)					0		(50)
Ending Outstanding (in shares)	38,326		72,279		38,326		72,279
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Outstanding, Weighted Average Grant Date Fair Value (usd per share)					$ 10.13		$ 9.06
Released, Weighted Average Grant Date Fair Value (usd per share)					$ 10.07		$ 7.65
Forfeited, Weighted Average Grant Date Fair Value (usd per share)					$ 0.00		$ 7.98
Ending Outstanding, Weighted Average Grant Date Fair Value (usd per share)	$ 10.17		$ 10.15		$ 10.17		$ 10.15
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period (in years)					4 years
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period (in years)					2 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)					1,059,417		891,293
Granted (in shares)					220,406		312,850
Exercised (in shares)					(260,726)		0
Forfeited (in shares)					(3,464)		(2,255)
Outstanding at end of period (in shares)	1,015,633		1,201,888		1,015,633		1,201,888
Exercisable at end of period (in shares)	664,934		597,245		664,934		597,245
Weighted average fair value of options granted during the period (usd per share)					$ 4.38		$ 1.82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period, Weighted Average Exercise Price (usd per share)					$ 6.71		$ 9.37
Granted, Weighted Average Exercise Price (usd per share)					$ 7.01		$ 2.95
Exercised, Weighted Average Exercise Price (usd per share)					$ 4.28		$ 0.00
Forfeited, Weighted Average Exercise Price (usd per share)					$ 6.92		$ 7.77
Outstanding at end of period, Weighted Average Exercise Price (usd per share)	$ 7.40		$ 7.71		$ 7.40		$ 7.71
Exercisable at end of period, Weighted Average Exercise Price (usd per share)	$ 8.11		$ 9.19		$ 8.11		$ 9.19
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk free interest rate					2.00%		1.00%
Expected life					6 years		6 years
Dividend rate					0.00%		0.00%
Volatility					69.00%		70.00%
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period (in years)					10 years
Option vesting period (in years)					4 years
Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period (in years)					2 years

[1] Stock-based compensation expense is included in selling, general and administrative expenses.