Stock Compensation - Summary of Stock Options Outstanding and Related Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
Warrant [Member] | HGI [Member]
Options (in shares):
Stock options outstanding at September 30, 2013		0
Granted		3,000
Stock options outstanding at June 30, 2014	3,000	3,000
Stock options vested and exercisable at June 30, 2014		600
Stock options outstanding and expected to vest	2,400	2,400
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2013		$ 0.00
Granted		$ 13.25
Stock options outstanding at June 30, 2014	$ 13.25	$ 13.25
Stock options vested and exercisable at June 30, 2014		$ 13.25
Stock options outstanding and expected to vest	$ 13.25	$ 13.25
Weighted Average Grant Date Fair Value (in dollars per share):
Stock options outstanding at September 30, 2013		$ 0.00
Granted		$ 3.19
Stock options outstanding at June 30, 2014	$ 3.19	$ 3.19
Stock options vested and exercisable at June 30, 2014		$ 3.19
Stock options outstanding and expected to vest	$ 3.19	$ 3.19
Employee Stock Option [Member] | HGI [Member]
Options (in shares):
Stock options outstanding at September 30, 2013		3,954
Granted	30	1,356	1,528
Exercised		(497)
Forfeited or expired		(70)
Stock options outstanding at June 30, 2014	4,743	4,743
Stock options vested and exercisable at June 30, 2014		1,429
Stock options outstanding and expected to vest	3,314	3,314
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2013		$ 6.52
Granted		$ 11.75
Exercised		$ 4.96
Forfeited or expired		$ 8.82
Stock options outstanding at June 30, 2014	$ 8.15	$ 8.15
Stock options vested and exercisable at June 30, 2014		$ 7.46
Stock options outstanding and expected to vest	$ 8.45	$ 8.45
Weighted Average Grant Date Fair Value (in dollars per share):
Stock options outstanding at September 30, 2013		$ 2.55
Granted		$ 4.91
Exercised		$ 1.77
Forfeited or expired		$ 3.66
Stock options outstanding at June 30, 2014	$ 3.29	$ 3.29
Stock options vested and exercisable at June 30, 2014		$ 2.96
Stock options outstanding and expected to vest	$ 3.43	$ 3.43
Employee Stock Option [Member] | FGLH [Member]
Options (in shares):
Stock options outstanding at September 30, 2013		335
Granted		0
Exercised		(41)
Forfeited or expired		(3)
Stock options outstanding at June 30, 2014	291	291
Stock options vested and exercisable at June 30, 2014		132
Stock options outstanding and expected to vest	152	152
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2013		$ 44.23
Granted		$ 0.00
Exercised		$ 41.23
Forfeited or expired		$ 47.06
Stock options outstanding at June 30, 2014	$ 44.62	$ 44.62
Stock options vested and exercisable at June 30, 2014		$ 42.33
Stock options outstanding and expected to vest	$ 44.57	$ 44.57
Employee Stock Option [Member] | FGL [Member]
Options (in shares):
Stock options outstanding at September 30, 2013		0
Granted		249
Exercised		0
Forfeited or expired		(4)
Stock options outstanding at June 30, 2014	245	245
Stock options vested and exercisable at June 30, 2014		0
Stock options outstanding and expected to vest	241	241
Weighted Average Exercise Price (in dollars per share):
Stock options outstanding at September 30, 2013		$ 0.00
Granted		$ 17.00
Exercised		$ 0.00
Forfeited or expired		$ 17.00
Stock options outstanding at June 30, 2014	$ 17.00	$ 17.00
Stock options vested and exercisable at June 30, 2014		$ 0.00
Stock options outstanding and expected to vest	$ 17.00	$ 17.00
Weighted Average Grant Date Fair Value (in dollars per share):
Stock options outstanding at September 30, 2013		$ 0.00
Granted		$ 3.76
Exercised		$ 0.00
Forfeited or expired		$ 5.26
Stock options outstanding at June 30, 2014	$ 3.73	$ 3.73
Stock options vested and exercisable at June 30, 2014		$ 0.00
Stock options outstanding and expected to vest	$ 3.70	$ 3.70