Income Taxes - Schedule of Net Operating Loss Carryforwards (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 480,142
Net operating loss carryforwards that will not be available to offset	258,339
2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	14,257
2017 to 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	32,654
2020 to 2022 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	225,188
2023 to 2025 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	40,454
2026 to 2028 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	12,186
2029 to 2031 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	3,330
Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	152,073
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	252,414
Net operating loss carryforwards that will not be available to offset	241,766
Federal [Member] | 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Federal [Member] | 2017 to 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Federal [Member] | 2020 to 2022 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	213,390
Federal [Member] | 2023 to 2025 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	26,838
Federal [Member] | 2026 to 2028 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	12,186
Federal [Member] | 2029 to 2031 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Federal [Member] | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	20,318
Net operating loss carryforwards that will not be available to offset	16,573
State [Member] | 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	12,793
State [Member] | 2017 to 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	190
State [Member] | 2020 to 2022 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
State [Member] | 2023 to 2025 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	4,005
State [Member] | 2026 to 2028 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
State [Member] | 2029 to 2031 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	3,330
State [Member] | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	207,410
Foreign [Member] | 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,464
Foreign [Member] | 2017 to 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	32,464
Foreign [Member] | 2020 to 2022 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	11,798
Foreign [Member] | 2023 to 2025 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	9,611
Foreign [Member] | 2026 to 2028 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Foreign [Member] | 2029 to 2031 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
Foreign [Member] | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 152,073