Share-Based Compensation (Details) - USD ($)	3 Months Ended			6 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that may be issued pursuant to the plan (in shares)		1,000,000		1,000,000
Document Period End Date				Dec. 31, 2015
Shares available for grant under the plan (in shares)		749,000		749,000
Tax benefit related to share-based compensation					$ 9,000
Vesting period				Upon satisfaction of the performance objectives, unvested shares are issued to the recipients and vest in one-third increments each August 31 subsequent to achieving the performance objectives as long as the recipients are employees throughout each such service period.
Unvested shares remaining at end of period			39,000		39,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	1,600
Allocated Share-based Compensation Expense		$ 69,000	$ 210,000	$ 315,000	$ 825,000
Number of shares [Abstract]
Unvested participating shares outstanding		30,300	39,000	30,300	39,000
2015 Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 787,000		$ 787,000
Allocated Share-based Compensation Expense		$ 69,000		$ 145,000
Number of shares [Abstract]
Granted (in shares)		39,000
2014 Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value			$ 773,000		$ 773,000
Unvested shares remaining at end of period		30,300		30,300
Allocated Share-based Compensation Expense			$ 210,000		$ 382,000
Number of shares [Abstract]
Granted (in shares)			39,000
2014 stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 169,000		$ 169,000
Number of shares [Abstract]
Granted (in shares)				8,400