Stock Compensation - Summary of Stock Options Outstanding and Related Activity (Detail) (Stock option awards [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 31, 2013	Apr. 01, 2012
HGI [Member]
Options (in shares):
Stock options outstanding at September 30, 2012			2,285
Granted	30	2,000	1,528	2,075
Exercised			0
Forfeited or expired			0
Stock options outstanding at March 31, 2013	3,813		3,813
Stock options vested and exercisable at March 31, 2013			846
Stock options outstanding and expected to vest	2,966		2,966
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2012			$ 4.96
Granted			$ 8.52
Exercised			$ 0.00
Forfeited or expired			$ 0.00
Stock options outstanding at March 31, 2013	$ 6.38		$ 6.38
Stock options vested and exercisable at March 31, 2013			$ 6.08
Stock options outstanding and expected to vest	$ 6.47		$ 6.47
Weighted Average Grant Date Fair Value (in dollars per share):
Stock options outstanding at September 30, 2012			$ 1.77
Granted			$ 3.53
Exercised			$ 0.00
Forfeited or expired			$ 0.00
Stock options outstanding at March 31, 2013	$ 2.47		$ 2.47
Stock options vested and exercisable at March 31, 2013			$ 2.32
Stock options outstanding and expected to vest	$ 2.52		$ 2.52
FGL [Member]
Options (in shares):
Stock options outstanding at September 30, 2012			201
Granted	194	205	194	205
Exercised			(15)
Forfeited or expired			0
Stock options outstanding at March 31, 2013	380		380
Stock options vested and exercisable at March 31, 2013			0
Stock options outstanding and expected to vest	330		330
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2012			$ 38.20
Granted			$ 49.45
Exercised			$ 38.14
Forfeited or expired			$ 0.00
Stock options outstanding at March 31, 2013	$ 43.34		$ 43.34
Stock options vested and exercisable at March 31, 2013			$ 0.00
Stock options outstanding and expected to vest	$ 43.34		$ 43.34
Weighted Average Grant Date Fair Value (in dollars per share):
Stock options outstanding at September 30, 2012			$ 3.90
Granted			$ 3.85
Exercised			$ 3.90
Forfeited or expired			$ 0.00
Stock options outstanding at March 31, 2013	$ 3.88		$ 3.88
Stock options vested and exercisable at March 31, 2013			$ 0.00
Stock options outstanding and expected to vest	$ 3.88		$ 3.88