Gogo (GOGO) 10-Q 7 Nov 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Nov. 04, 2019
Cover [Abstract]
Document Type	10-Q
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	Gogo Inc.
Entity Central Index Key	0001537054
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common stock
Entity Common Stock, Shares Outstanding		88,157,826
Trading Symbol	GOGO
Security Exchange Name	NASDAQ
Entity Address, Country	IL

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 217,662	$ 184,155
Short-term investments		39,323
Total cash, cash equivalents and short-term investments	217,662	223,478
Accounts receivable, net of allowances of $3,542 and $500, respectively	102,708	134,308
Inventories	133,413	193,045
Prepaid expenses and other current assets	25,018	34,695
Total current assets	478,801	585,526
Non-current assets:
Property and equipment, net	553,040	511,867
Goodwill and intangible assets, net	80,381	83,491
Operating lease right-of-use assets	84,483
Other non-current assets	83,669	84,212
Total non-current assets	801,573	679,570
Total assets	1,280,374	1,265,096
Current liabilities:
Accounts payable	25,521	23,860
Accrued liabilities	200,753	213,111
Deferred revenue	32,499	38,571
Deferred airborne lease incentives	24,954	24,145
Total current liabilities	283,727	299,687
Non-current liabilities:
Long-term debt	1,096,166	1,024,893
Deferred airborne lease incentives	133,328	129,086
Non-current operating lease liabilities	96,208
Other non-current liabilities	53,774	80,191
Total non-current liabilities	1,379,476	1,234,170
Total liabilities	1,663,203	1,533,857
Commitments and contingencies (Note 12)
Stockholders' deficit
Common stock, par value $0.0001 per share; 500,000,000 shares authorized at September 30, 2019 and December 31, 2018; 88,209,754 and 87,678,812 shares issued at September 30, 2019 and December 31, 2018, respectively; and 88,157,826 and 87,560,694 shares outstanding at September 30, 2019 and December 31, 2018, respectively	9	9
Additional paid-in-capital	975,462	963,458
Accumulated other comprehensive loss	(2,880)	(3,554)
Accumulated deficit	(1,355,420)	(1,228,674)
Total stockholders' deficit	(382,829)	(268,761)
Total liabilities and stockholders' deficit	$ 1,280,374	$ 1,265,096

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowances on accounts receivable	$ 3,542	$ 500
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	88,209,754	87,678,812
Common stock, shares outstanding	88,157,826	87,560,694

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Total revenue	$ 201,182	$ 217,257	$ 614,416	$ 676,540
Operating expenses:
Cost of service revenue (exclusive of items shown below)	73,891	69,476	213,506	218,073
Cost of equipment revenue (exclusive of items shown below)	28,830	53,960	94,132	170,603
Engineering, design and development	28,877	30,018	80,517	88,204
Sales and marketing	12,334	13,963	37,646	45,291
General and administrative	20,740	24,860	70,275	71,152
Depreciation and amortization	29,292	32,590	90,008	100,447
Total operating expenses	193,964	224,867	586,084	693,770
Operating income (loss)	7,218	(7,610)	28,332	(17,230)
Other (income) expense:
Interest income	(987)	(903)	(3,366)	(3,307)
Interest expense	30,740	30,743	99,444	91,938
Loss on extinguishment of debt			57,962
Other (income) expense	143	72	(2,779)	(59)
Total other expense	29,896	29,912	151,261	88,572
Loss before income taxes	(22,678)	(37,522)	(122,929)	(105,802)
Income tax provision (benefit)	213	195	724	(3,459)
Net loss	$ (22,891)	$ (37,717)	$ (123,653)	$ (102,343)
Net loss attributable to common stock per share—basic and diluted	$ (0.28)	$ (0.47)	$ (1.54)	$ (1.28)
Weighted average number of shares—basic and diluted	80,908	80,196	80,370	79,948
Service [Member]
Revenue:
Total revenue	$ 158,399	$ 160,376	$ 497,142	$ 470,110
Product [Member]
Revenue:
Total revenue	$ 42,783	$ 56,881	$ 117,274	$ 206,430

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (22,891)	$ (37,717)	$ (123,653)	$ (102,343)
Currency translation adjustments, net of tax	(663)	378	674	(1,835)
Comprehensive loss	$ (23,554)	$ (37,339)	$ (122,979)	$ (104,178)

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net loss	$ (123,653)	$ (102,343)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	90,008	100,447
Loss on asset disposals, abandonments and write-downs	8,246	8,103
Gain on transition to airline-directed model		(21,551)
Deferred income taxes	133	(3,866)
Stock-based compensation expense	12,711	12,531
Amortization of deferred financing costs	3,901	3,143
Accretion and amortization of debt discount and premium	11,490	14,000
Loss on extinguishment of debt	57,962
Changes in operating assets and liabilities:
Accounts receivable	28,496	(28,501)
Inventories	12,823	(37,451)
Prepaid expenses and other current assets	9,752	(1,141)
Contract assets	(18,982)	(21,557)
Accounts payable	993	5,568
Accrued liabilities	(11,292)	13,211
Deferred airborne lease incentives	(1,729)	(4,040)
Deferred revenue	(1,412)	(2,216)
Accrued interest	(1,993)	(24,955)
Warranty reserves	2,289	5,888
Other non-current assets and liabilities	(4,404)	(7,166)
Net cash provided by (used in) operating activities	75,339	(91,896)
Investing activities:
Purchases of property and equipment	(65,516)	(107,096)
Acquisition of intangible assets—capitalized software	(12,712)	(17,316)
Purchases of short-term investments		(39,323)
Redemptions of short-term investments	39,323	163,540
Other, net	2,504
Net cash used in investing activities	(36,401)	(195)
Financing activities:
Proceeds from issuance of senior secured notes	920,683
Redemption of senior secured notes	(741,360)
Repurchase of convertible notes	(159,502)
Payment of debt issuance costs	(23,433)
Payments on financing leases	(552)	(1,626)
Stock-based compensation activity	88	81
Net cash used in financing activities	(4,076)	(1,545)
Effect of exchange rate changes on cash	(357)	(530)
Increase (decrease) in cash, cash equivalents and restricted cash	34,505	(94,166)
Cash, cash equivalents and restricted cash at beginning of period	191,116	203,729
Cash, cash equivalents and restricted cash at end of period	225,621	109,563
Cash, cash equivalents and restricted cash at end of period	225,621	109,563
Less: current restricted cash	535	1,773
Less: non-current restricted cash	7,424	5,126
Cash and cash equivalents at end of period	217,662	102,664
Supplemental Cash Flow Information:
Cash paid for interest	86,477	99,823
Cash paid for taxes	456	390
Noncash Investing and Financing Activities:
Purchases of property and equipment in current liabilities	15,363	14,739
Purchases of property and equipment paid by commercial airlines	$ 13,653	$ 5,920

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2017	$ (191,564)	$ 9	$ 898,729	$ (933)	$ (1,089,369)
Beginning Balance, Shares at Dec. 31, 2017		86,843,928
Net loss	(102,343)				(102,343)
Currency translation adjustments, net of tax	(1,835)			(1,835)
Stock-based compensation expense	12,531		12,531
Issuance of common stock upon exercise of stock options	21		21
Issuance of common stock upon exercise of stock options, Shares		2,500
Issuance of common stock upon vesting of restricted stock units and restricted stock awards, Shares		380,242
Tax withholding related to vesting of restricted stock units	(1,154)		(1,154)
Issuance of common stock in connection with employee stock purchase plan	1,214		1,214
Issuance of common stock in connection with employee stock purchase plan, Shares		231,761
Impact of the adoption of ASC 842	21,849				21,849
Ending Balance at Sep. 30, 2018	(261,281)	$ 9	911,341	(2,768)	(1,169,863)
Ending Balance, Shares at Sep. 30, 2018		87,458,431
Beginning Balance at Jun. 30, 2018	(228,212)	$ 9	907,071	(3,146)	(1,132,146)
Beginning Balance, Shares at Jun. 30, 2018		87,351,300
Net loss	(37,717)				(37,717)
Currency translation adjustments, net of tax	378			378
Stock-based compensation expense	3,932		3,932
Issuance of common stock upon vesting of restricted stock units and restricted stock awards, Shares		16,370
Tax withholding related to vesting of restricted stock units	(27)		(27)
Issuance of common stock in connection with employee stock purchase plan	365		365
Issuance of common stock in connection with employee stock purchase plan, Shares		90,761
Ending Balance at Sep. 30, 2018	(261,281)	$ 9	911,341	(2,768)	(1,169,863)
Ending Balance, Shares at Sep. 30, 2018		87,458,431
Beginning Balance at Dec. 31, 2018	(268,761)	$ 9	963,458	(3,554)	(1,228,674)
Beginning Balance, Shares at Dec. 31, 2018		87,560,694
Net loss	(123,653)				(123,653)
Currency translation adjustments, net of tax	674			674
Stock-based compensation expense	$ 12,711		12,711
Issuance of common stock upon exercise of stock options, Shares	478,147
Issuance of common stock upon vesting of restricted stock units and restricted stock awards
Issuance of common stock upon vesting of restricted stock units and restricted stock awards, Shares		359,005
Tax withholding related to vesting of restricted stock units	(834)		(834)
Issuance of common stock in connection with employee stock purchase plan	922		922
Issuance of common stock in connection with employee stock purchase plan, Shares		238,127
Repurchase of 2020 Convertible Notes	(795)		(795)
Impact of the adoption of ASC 842	(3,093)				(3,093)
Ending Balance at Sep. 30, 2019	(382,829)	$ 9	975,462	(2,880)	(1,355,420)
Ending Balance, Shares at Sep. 30, 2019		88,157,826
Beginning Balance at Jun. 30, 2019	(363,607)	$ 9	971,130	(2,217)	(1,332,529)
Beginning Balance, Shares at Jun. 30, 2019		88,062,965
Net loss	(22,891)				(22,891)
Currency translation adjustments, net of tax	(663)			(663)
Stock-based compensation expense	4,066		4,066
Issuance of common stock upon vesting of restricted stock units and restricted stock awards, Shares		13,892
Tax withholding related to vesting of restricted stock units	(27)		(27)
Issuance of common stock in connection with employee stock purchase plan	293		293
Issuance of common stock in connection with employee stock purchase plan, Shares		80,969
Ending Balance at Sep. 30, 2019	$ (382,829)	$ 9	$ 975,462	$ (2,880)	$ (1,355,420)
Ending Balance, Shares at Sep. 30, 2019		88,157,826

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation The Business - in-flight “CA-NA,” “CA-ROW,” CA-NA CA-ROW Wi-Fi-enabled in-flight Wi-Fi CA-NA CA-ROW CA-ROW in-flight in-flight in-flight in-flight Basis of Presentation— S-X 10-K 10-K”). The results of operations and cash flows for the three and nine month periods ended September 30, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019. We have one class of common stock outstanding as of September 30, 2019 and December 31, 2018. Reclassifications Transition of airline models non-current non-current non-current warranty reserves related to previously sold equipment that are still under a warranty period, which is included within accrued liabilities. See Note 8, “Warranties,” for additional information. This transition from the turnkey model to the airline-directed model occurred on January , and in thousands Increase Unaudited condensed consolidated balance sheet Prepaid expense and other current assets $ 6,603 Property and equipment, net (32,716 ) Other non-current 18,783 Accrued liabilities 2,000 Current deferred airborne lease incentive (13,592 ) Non-current (17,289 ) Unaudited condensed consolidated statement of operations Equipment revenue 45,396 Cost of equipment revenue 23,845 As of January 1, 2019, one airline transitioned from the airline-directed model to the turnkey model. This transition did not have a material impact to our unaudited condensed consolidated statements of operations. However, as a result of such transition, $46.8 million of Inventory was reclassified to Property and equipment, net as of January 1, 2019. See Note 2, “Summary of Significant Accounting Policies — 10-K non-current right-of-use Use of Estimates —

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements Accounting standards adopted: On January 1, 2019, we adopted Accounting Standards Codification Topic 842, Leases We elected the practical expedients regarding use of hindsight to evaluate lease terms as well as maintaining lease classifications established under the prior lease accounting standard. Through this practical expedient, we did not reevaluate contracts to determine if they contained a lease. We did not elect the practical expedients regarding short-term leases or the separation of lease and non-lease Adoption of ASC 842 had a material impact on our consolidated balance sheet through recognition of right-of-use The discount rate used to calculate the adjustment to the opening balance was our incremental borrowing rate as of the adoption date, January 1, 2019. The cumulative effect of the adoption of ASC 842 to our unaudited condensed consolidated balance sheet as of January 1, 2019 was as follows ( in thousands) Balance at Impact of Balances with Assets Operating lease right-of-use $ — $ 72,188 $ 72,188 Liabilities Accrued liabilities 213,111 9,019 222,130 Non-current — 102,440 102,440 Other non-current 80,191 (36,178 ) 44,013 Equity Accumulated deficit (1,228,674 ) (3,093 ) (1,231,767 ) See Note 11, “Leases,” for additional information. On January 1, 2019, we adopted ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income 2018-02”), On January 1, 2019, we adopted ASU 2018-07, Improvements to Nonemployee Share-Based Payment Accounting 2018-07”), Compensation – Stock Compensation

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	3. Revenue Recognition Arrangements with commercial airlines For CA-NA CA-ROW, Remaining performance obligations As of September 30, 2019, the aggregate amount of the transaction price in our contracts allocated to the remaining unsatisfied performance obligations is approximately $551 million, most of which relates to our commercial aviation contracts. Approximately $79 million represents future equipment revenue that is expected to be recognized within the next one to three years. The remaining $472 million primarily represents connectivity and entertainment service revenues which are recognized as services are provided, which is expected to occur through the remaining term of the contract (approximately 5-10 Disaggregation of revenue The following table presents our revenue disaggregated by category (in thousands) For the Three Months Ended September 30, 2019 CA-NA CA-ROW BA Total Service revenue Connectivity $ 73,222 $ 21,580 $ 54,698 $ 149,500 Entertainment, CAS and other 7,248 1,000 651 8,899 Total service revenue $ 80,470 $ 22,580 $ 55,349 $ 158,399 Equipment revenue ATG $ 2,247 $ — $ 20,099 $ 22,346 Satellite 1,178 13,127 5,292 19,597 Other 240 — 600 840 Total equipment revenue $ 3,665 $ 13,127 $ 25,991 $ 42,783 Customer type Airline passenger and aircraft owner/operator $ 45,744 $ 7,204 $ 55,349 $ 108,297 Airline, OEM and aftermarket dealer 28,258 26,400 25,991 80,649 Third party 10,133 2,103 — 12,236 Total revenue $ 84,135 $ 35,707 $ 81,340 $ 201,182 For the Three Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue Connectivity $ 85,930 $ 17,168 $ 48,926 $ 152,024 Entertainment, CAS and other 7,513 478 361 8,352 Total service revenue $ 93,443 $ 17,646 $ 49,287 $ 160,376 Equipment revenue ATG $ 2,518 $ — $ 20,158 $ 22,676 Satellite 12,509 17,551 4,022 34,082 Other — — 123 123 Total equipment revenue $ 15,027 $ 17,551 $ 24,303 $ 56,881 Customer type Airline passenger and aircraft owner/operator $ 53,873 $ 6,086 $ 49,287 $ 109,246 Airline, OEM and aftermarket dealer 39,336 27,146 24,303 90,785 Third party 15,261 1,965 — 17,226 Total revenue $ 108,470 $ 35,197 $ 73,590 $ 217,257 For the Nine Months Ended September 30, 2019 CA-NA CA-ROW BA Total Service revenue Connectivity $ 243,273 $ 62,090 $ 161,559 $ 466,922 Entertainment, CAS and other 25,626 2,835 1,759 30,220 Total service revenue $ 268,899 $ 64,925 $ 163,318 $ 497,142 Equipment revenue ATG $ 10,755 $ — $ 43,778 $ 54,533 Satellite 5,137 40,430 14,336 59,903 Other 1,140 — 1,698 2,838 Total equipment revenue $ 17,032 $ 40,430 $ 59,812 $ 117,274 Customer type Airline passenger and aircraft owner/operator $ 155,993 $ 19,822 $ 163,318 $ 339,133 Airline, OEM and aftermarket dealer 96,054 79,571 59,812 235,437 Third party 33,884 5,962 — 39,846 Total revenue $ 285,931 $ 105,355 $ 223,130 $ 614,416 For the Nine Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue Connectivity $ 256,803 $ 45,365 $ 144,149 $ 446,317 Entertainment, CAS and other 21,169 1,711 913 23,793 Total service revenue $ 277,972 $ 47,076 $ 145,062 $ 470,110 Equipment revenue ATG (1) $ 49,534 $ — $ 56,076 $ 105,610 Satellite (1) 44,435 40,935 12,741 98,111 Other — — 2,709 2,709 Total equipment revenue $ 93,969 $ 40,935 $ 71,526 $ 206,430 Customer type Airline passenger and aircraft owner/operator $ 161,515 $ 15,912 $ 145,062 $ 322,489 Airline, OEM and aftermarket dealer (2) 165,903 66,151 71,526 303,580 Third party 44,523 5,948 — 50,471 Total revenue $ 371,941 $ 88,011 $ 216,588 $ 676,540 1) ATG and satellite equipment revenue for the CA-NA 2) Airline, OEM and aftermarket dealer revenue includes all equipment revenue for our three segments, including the $45.4 million accounting impact of the transition of one of our airline partners to the airline-directed model. Contract balances Our current and non-current Our current and non-current Capitalized STC balances for our airline-directed contracts were $17.6 million and $16.5 million as of September 30, 2019 and December 31, 2018, respectively. The capitalized STC costs are amortized over the life of the associated airline-directed contracts as part of our engineering, design and development costs in our unaudited condensed consolidated statements of operations. Total amortization expense was $1.3 million and $1.9 million, respectively, for the three and nine month periods ended September 30, 2019, and $0.3 million and $0.7 million for the respective prior-year periods.

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share	4. Net Loss Per Share Basic and diluted net loss per share have been calculated using the weighted average number of common shares outstanding for the period. The shares of common stock effectively repurchased in connection with the Forward Transactions (as defined and described in Note 9, “Long-Term Debt and Other Liabilities”) are considered participating securities requiring the two-class As a result of the net loss for the three and nine month periods ended September 30, 2019 and 2018, all of the outstanding shares of common stock underlying stock options, deferred stock units and restricted stock units were excluded from the computation of diluted shares outstanding because they were anti-dilutive. The following table sets forth the computation of basic and diluted earnings per share for the three and nine month periods ended September 30, 2019 and 2018; however, because of the undistributed losses, the shares of common stock associated with the Forward Transactions are excluded from the computation of basic earnings per share in 2019 and 2018 as undistributed losses are not allocated to these shares ( in thousands, except per share amounts For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Net loss $ (22,891 ) $ (37,717 ) $ (123,653 ) $ (102,343 ) Less: Participation rights of the Forward Transactions — — — — Undistributed losses $ (22,891 ) $ (37,717 ) $ (123,653 ) $ (102,343 ) Weighted-average common shares outstanding-basic and diluted 80,908 80,196 80,370 79,948 Net loss attributable to common stock per share-basic and diluted $ (0.28 ) $ (0.47 ) $ (1.54 ) $ (1.28 )

Inventories

Inventories	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventories	5. Inventories Inventories consist primarily of telecommunications systems and parts and are recorded at the lower of cost (average cost) or market. We evaluate the need for write-downs associated with obsolete, slow-moving and nonsalable inventory by reviewing net realizable inventory values on a periodic basis. Inventories as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Work-in-process $ 27,644 $ 30,340 Finished goods (1) 105,769 162,705 Total inventory $ 133,413 $ 193,045 (1) The change between September 30, 2019 and December 31, 2018 includes the $ 46.8

Composition of Certain Balance

Composition of Certain Balance Sheet Accounts	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Composition of Certain Balance Sheet Accounts	6. Composition of Certain Balance Sheet Accounts Prepaid expenses and other current assets as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Contract assets $ 11,518 $ 10,423 Prepaid satellite services 1,026 7,755 Restricted cash 535 1,535 Other 11,939 14,982 Total prepaid expenses and other current assets $ 25,018 $ 34,695 Property and equipment as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Office equipment, furniture, fixtures and other $ 54,833 $ 52,320 Leasehold improvements 44,832 44,838 Airborne equipment (1) 737,999 642,151 Network equipment 209,501 205,463 1,047,165 944,772 Accumulated depreciation (494,125 ) (432,905 ) Total property and equipment, net $ 553,040 $ 511,867 (1) The change between September 30, 2019 and December 31, 2018 includes the $46.8 million accounting impact of one of our airline partner agreements transitioning to the turnkey model in January 2019 (see Note 1, “Basis of Presentation,” for additional information). Other non-current in thousands September 30, December 31, 2019 2018 Contract assets $ 49,796 $ 49,517 Deferred STC costs 17,618 16,453 Restricted cash 7,424 5,426 Other 8,831 12,816 Total other non-current $ 83,669 $ 84,212 Accrued liabilities as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Airline related accrued liabilities $ 44,123 $ 53,527 Accrued interest 44,701 46,694 Employee compensation and benefits 25,330 19,463 Airborne equipment and installation costs 12,851 25,119 Accrued satellite network costs 16,585 19,557 Warranty reserve 11,579 12,291 Operating leases (1) 11,917 — Other 33,667 36,460 Total accrued liabilities $ 200,753 $ 213,111 (1) The change between September 30, 2019 and December 31, 2018 is due to the adoption of ASC 842. See Note 2, “Recent Accounting Pronouncements,” for additional information. Other non-current in thousands September 30, December 31, 2019 2018 Deferred revenue $ 30,154 $ 21,482 Deferred rent (1) — 35,897 Asset retirement obligations 11,243 9,696 Deferred tax liabilities 2,295 2,162 Other 10,082 10,954 Total other non-current $ 53,774 $ 80,191 (1) The change between September 30, 2019 and December 31, 2018 is due to the adoption of ASC 842. See Note 2, “Recent Accounting Pronouncements,” for additional information.

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	7. Intangible Assets Our intangible assets are comprised of both indefinite-lived and finite-lived intangible assets. Intangible assets with indefinite lives and goodwill are not amortized; rather, they are reviewed for impairment at least annually or whenever events or circumstances indicate the carrying value of the asset may not be recoverable. We perform our annual impairment tests of our indefinite-lived intangible assets and goodwill during the fourth quarter of each fiscal year. We also reevaluate the useful life of indefinite-lived intangible assets each reporting period to determine whether events and circumstances continue to support an indefinite useful life. The results of our annual indefinite-lived intangible assets and goodwill impairment assessments in the fourth quarter of 2018 indicated no impairment. As of both September 30, 2019 and December 31, 2018, our goodwill balance, all of which related to our BA segment, was $0.6 million. Our intangible assets, other than goodwill, as of September 30, 2019 and December 31, 2018 were as follows ( in thousands, except for weighted average remaining useful life Weighted Average As of September 30, 2019 As of December 31, 2018 Remaining Gross Net Gross Net Useful Life Carrying Accumulated Carrying Carrying Accumulated Carrying (in years) Amount Amortization Amount Amount Amortization Amount Amortized intangible assets: Software 2.7 $ 176,539 $ (131,144 ) $ 45,395 $ 164,580 $ (116,873 ) $ 47,707 Service customer relationship 0.5 8,081 (7,566 ) 515 8,081 (6,804 ) 1,277 Other intangible assets 7.8 3,000 (1,432 ) 1,568 3,000 (1,396 ) 1,604 OEM and dealer relationships 6,724 (6,724 ) — 6,724 (6,724 ) — Total amortized intangible assets 194,344 (146,866 ) 47,478 182,385 (131,797 ) 50,588 Unamortized intangible assets: FCC Licenses 32,283 — 32,283 32,283 — 32,283 Total intangible assets $ 226,627 $ (146,866 ) $ 79,761 $ 214,668 $ (131,797 ) $ 82,871 Amortization expense was $4.6 million and $15.1 million, respectively, for the three and nine month periods ended September 30, 2019 and $4.9 million and $16.5 million, respectively, for the prior-year periods. Amortization expense for each of the next five years and thereafter is estimated to be as follows ( in thousands Amortization Years ending December 31, Expense 2019 (period from October 1 to December 31) $ 5,151 2020 $ 18,394 2021 $ 13,573 2022 $ 8,068 2023 $ 1,310 Thereafter $ 982 Actual future amortization expense could differ from the estimated amount as a result of future investments and other factors.

Warranties

Warranties	9 Months Ended
	Sep. 30, 2019
Guarantees and Product Warranties [Abstract]
Warranties	8. Warranties We provide warranties on parts and labor related to our products. Our warranty terms range from two to ten years. Warranty reserves are established for costs that are estimated to be incurred after the sale, delivery and installation of the products under warranty. The warranty reserves are determined based on known product failures, historical experience and other available evidence, and are included in accrued liabilities in our unaudited condensed consolidated balance sheets. Our warranty reserve balance was $11.6 million and $12.3 million, respectively, as of September 30, 2019 and December 31, 2018.

Long-Term Debt and Other Liabil

Long-Term Debt and Other Liabilities	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt and Other Liabilities	9. Long-Term Debt and Other Liabilities Long-term debt as of September 30, 2019 and December 31, 2018 was as follows ( in thousands September 30, December 31, 2019 2018 2024 Senior Secured Notes $ 920,965 $ — 2022 Senior Secured Notes — 702,670 2022 Convertible Notes 198,818 190,083 2020 Convertible Notes 2,498 149,195 Total debt 1,122,281 1,041,948 Less deferred financing costs (26,115 ) (17,055 ) Total long-term debt $ 1,096,166 $ 1,024,893 2024 Senior Secured Notes - o 1, 2019 the Cash Flow Priority Collateral (as defined below), including pledged equity interests of the Issuers and all of GIH’s existing and future restricted subsidiaries guaranteeing the 2024 Senior Secured Notes, except for certain excluded assets and subject to permitted liens. As of September 30, 2019, the outstanding principal amount of the 2024 Senior Secured Notes was $925 million, the unaccreted debt discount was $4.0 million and the net carrying amount was $921.0 million. We used a portion of the net proceeds from the issuance of the 2024 Senior Secured Notes to fund the redemption of all the outstanding 2022 Senior Secured Notes (as defined below) and to repurchase $159 million aggregate principal amount of the 2020 Convertible Notes (as defined below). We intend to use the remaining net proceeds for general corporate purposes. The 2024 Senior Secured Notes will mature on May 1, 2024 semiannually We paid approximately $22.6 million of origination fees and financing costs related to the issuance of the 2024 Senior Secured Notes, which have been accounted for as deferred financing costs. The deferred financing costs on our unaudited condensed consolidated balance sheet are being amortized over the contractual term of the 2024 Senior Secured Notes using the effective interest method. Total amortization expense was $0.9 million and $1.5 million, respectively, for the three and nine month periods ended September 30, 2019. As of September 30, 2019, the balance of unamortized deferred financing costs related to the 2024 Senior Secured Notes was $21.2 million and is included as a reduction to long-term debt in our unaudited condensed consolidated balance sheet. See Note 10, “Interest Costs,” for additional information. The 2024 Senior Secured Notes are the senior secured indebtedness of the Issuers and are: • effectively senior to (i) all of the Issuers’ existing and future senior unsecured indebtedness to the extent of the value of the collateral securing the 2024 Senior Secured Notes and (ii) the Issuers’ indebtedness secured on a junior priority basis by the same • effectively equal in right of payment with the Issuers’ existing and future (i) unsecured indebtedness that is not subordinated in right of payment to the 2024 Senior Secured Notes and (ii) indebtedness secured on a junior priority basis by the same collateral securing the 2024 Senior Secured Notes, if any, in each case to the extent of any insufficiency in the collateral securing the 2024 Senior Secured Notes; • structurally senior to all of our existing and future indebtedness, including our 2022 Convertible Notes and 2020 Convertible Notes (each as defined below); • senior in right of payment to any and all of the Issuers’ future indebtedness that is subordinated in right of payment to the 2024 Senior Secured Notes; • structurally subordinated to all of the indebtedness and other liabilities of any non-2024 • effectively subordinated to all of our existing and future indebtedness secured on a senior priority basis by the same Each guarantee is a senior secured obligation of such 2024 Guarantor and is: • effectively senior in right of payment to all existing and future (i) to the extent of the value of the collateral securing such guarantee owned by such 2024 Guarantor and (ii) owned by , including the obligations under the ABL Credit Facility to the extent of the value of the Cash Flow Priority Collateral ; • effectively equal in right of payment with all existing and future unsubordinated indebtedness and indebtedness secured on a junior priority basis by the same collateral securing the guarantee owned by such 2024 Guarantor • effectively subordinated to the obligations under the ABL Credit Facility of each 2024 Guara n • effectively senior in right of payment to all existing and future subordinated indebtedness, if any, of such 2024 Guarantor; and • structurally subordinated to all indebtedness and other liabilities of any non-2024 The security interests in certain collateral may be released without the consent of holders of the 2024 Senior Secured Notes if such collateral is disposed of in a transaction that complies with the 2024 Indenture and related security agreements, and if any grantor of such security interests is released from its obligations with respect to the 2024 Senior Secured Notes in accordance with the applicable provisions of the 2024 Indenture and related security agreements. Under certain circumstances, GIH and the 2024 Guarantors have the right to transfer certain intellectual property assets that on the Issue Date constitute collateral securing the 2024 Senior Secured Notes or the guarantees to a restricted subsidiary organized under the laws of Switzerland, resulting in the release of such collateral. In addition, the 2024 Indenture permits indebtedness incurred under the ABL Credit Facility to be secured on a first-priority basis by certain of the same collateral that secures the 2024 Senior Secured Notes. The Issuers may redeem the 2024 Senior Secured Notes, in whole or in part, at any time prior to May 1, 2021, at a redemption price equal to 100% of the principal amount of the 2024 Senior Secured Notes redeemed plus the make-whole premium set forth in the 2024 Indenture as of, and accrued and unpaid interest, if any, to (but not including) the applicable redemption date. On or after May 1, 2021, the 2024 Senior Secured Notes will be redeemable at the following redemption prices (expressed in percentages of principal amount), plus accrued and unpaid interest, if any, to (but not including) the redemption date (subject to the right of holders of record on the relevant regular record date on or prior to the redemption date to receive interest due on an interest payment date), if redeemed during the twelve-month period commencing on May 1 of the following years: Year Redemption 2021 104.938 % 2022 102.469 % 2023 and thereafter 100.000 % In addition, at any time prior to May 1, 2021, the Issuers may redeem up to 40% of the aggregate principal amount of the 2024 Senior Secured Notes with the proceeds of certain equity offerings at a redemption price of 109.875% of the principal amount redeemed, plus accrued and unpaid interest, if any, to (but not including) the date of redemption; , In addition, if GIH receives cash proceeds in connection with the entry into or continuation of a strategic relationship, or equity from us in connection with the sale of stock to a complimentary business (in each case, a “strategic investment”) at any time prior to May 1, 2020, the Issuers may redeem up to $150 million of the aggregate principal amount of the 2024 Senior Secured Notes at 103% of the principal amount of the 2024 Senior Secured Notes to be redeemed, plus accrued and unpaid interest, if any, to (but not including) the redemption date with the proceeds from such strategic investment. The 2024 Indenture contains covenants that, among other things, limit the ability of the Issuers and the 2024 Subsidiary Guarantors and, in certain circumstances, our ability, to: incur additional indebtedness; pay dividends, redeem stock or make other distributions; make investments; create restrictions on the ability of GIH’s restricted subsidiaries to pay dividends to the Issuers or make other intercompany transfers; create liens; transfer or sell assets; merge or consolidate; and enter into certain transactions with the Issuers’ affiliates. Most of these covenants will cease to apply if, and for as long as, the 2024 Senior Secured Notes have investment grade ratings from both Moody’s Investment Services, Inc. and Standard & Poor’s. If we or the Issuers undergo specific types of change of control accompanied by a downgrade in the rating of the 2024 Senior Secured Notes prior to May 1, 2024, GIH is required to make an offer to repurchase for cash all of the 2024 Senior Secured Notes at a repurchase price equal to 101% of the principal amount thereof, plus accrued and unpaid interest, if any, to (but not including) the payment date. The 2024 Indenture provides for events of default, which, if any of them occur, would permit or require the principal, premium, if any, and interest on all of the then outstanding 2024 Senior Secured Notes issued under the 2024 Indenture to be due and payable immediately. As of September 30, 2019, no event of default had occurred. ABL Credit Facility sub-facilities. Borrowing availability under the ABL Credit Facility is determined by a monthly borrowing base collateral calculation that is based on specified percentages of the value of eligible accounts receivable (including eligible unbilled accounts receivable) and eligible credit card receivables, less certain reserves and subject to certain other adjustments as set forth in the ABL Credit Agreement. Availability is reduced by issuance of letters of credit as well as any borrowings. As of September 30, 2019, no revolving loans were outstanding under the ABL Credit Facility. The final maturity of the ABL Credit Facility is August 26, 2022, unless the aggregate outstanding principal amount of our 2022 Convertible Notes (as defined below) has not, on or prior to December 15, 2021, been repaid in full or refinanced with a new maturity date no earlier than February 26, 2023, in which case the final maturity date shall instead be December 16, 2021. Loans outstanding under the ABL Credit Facility bear interest at a floating rate measured by reference to, at the Borrowers’ option, either (i) an adjusted London inter-bank offered rate plus an applicable margin ranging from % to % per annum depending on a fixed charge coverage ratio, or (ii) an alternate base rate plus an applicable margin ranging from % to % per annum depending on a fixed charge coverage ratio. Unused commitments under the ABL Credit Facility are subject to a per annum fee ranging from % to % depending on the average quarterly usage of the revolving commitments. The obligations under the ABL Credit Agreement are guaranteed by Gogo Inc. and all of its existing and future subsidiaries, subject to certain exceptions (collectively, the “ABL Guarantors”), and such obligations and the obligations of the ABL Guarantors are secured on a (i) senior basis by a perfected security interest in all present and after-acquired inventory, accounts receivable, deposit accounts, securities accounts, and any cash or other assets in such accounts and other related assets owned by each ABL Guarantor and the proceeds of the foregoing, subject to certain exceptions (the “ABL Priority Collateral”) and (ii) junior basis by a perfected security interest in substantially all other tangible and intangible assets owned by each ABL Guarantor (the “Cash Flow Priority Collateral”). The ABL Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants. The negative covenants include restrictions on, among other things: the incurrence of additional indebtedness; the incurrence of additional liens; dividends or other distributions on equity; the purchase, redemption or retirement of capital stock; the payment or redemption of certain indebtedness; loans, guarantees and other investments; entering into other agreements that create restrictions on the ability to pay dividends or make other distributions on equity, make or repay certain loans, create or incur certain liens or guarantee certain indebtedness; asset sales; sale-leaseback transactions; swap agreements; consolidations or mergers; amendment of certain material documents; certain regulatory matters; Canadian pension plans; and affiliate transactions. The negative covenants are subject to customary exceptions and also permit dividends and other distributions on equity, investments, permitted acquisitions and payments or redemptions of indebtedness upon satisfaction of the “payment conditions.” The payment conditions are deemed satisfied upon Specified Availability (as defined in the ABL Credit Agreement) on the date of the designated action and Specified Availability for the prior 30-day period exceeding agreed-upon thresholds, the absence of the occurrence and continuance of any default and, in certain cases, pro forma compliance with a fixed charge coverage ratio of no less than to . The ABL Credit Agreement includes a minimum fixed charge coverage ratio test of no less than to 1.00, which is tested only when Specified Availability is less than the greater of (A) $ million and (B) 15.0 % of the then effective commitments under the ABL Credit Facility, and continuing until the first day immediately succeeding the last day of the calendar month which includes the thirtieth (30th) consecutive day on which Specified Availability is in excess of such threshold so long as no default has occurred and is continuing and certain other conditions are met. As of September 30, 2019, Specified Availability had not fallen below the amount specified and therefore the minimum fixed charge coverage ratio test was not applicable. Full availability under the ABL Credit Facility may be limited by our ability to comply with the fixed charge coverage ratio in future periods. The ABL Credit Agreement provides for events of default, which, if any of them occurs, would permit or require the principal, premium, if any, and interest on all of the then outstanding obligations under the ABL Credit Facility to be due and payable immediately and the commitments under the ABL Credit Facility to be terminated. On August 26, 2019, the Borrowers and the ABL Guarantors entered into an ABL collateral agreement (the “ABL Collateral Agreement”), in favor of the Administrative Agent, whereby the Borrowers and the ABL Guarantors granted a security interest in substantially all tangible and intangible assets of each Borrower and each ABL Guarantor, to secure all obligations of the Borrowers and the ABL Guarantors under the ABL Credit Agreement, and U.S. Bank National Association, as cash flow collateral representative, and JPMorgan Chase Bank, N.A., as ABL agent, entered into a crossing lien intercreditor agreement (the “ Intercreditor Agreement”) to govern the relative priority of liens on the collateral that secures the ABL Credit Agreement and the 2024 Senior Secured Notes and certain other rights, priorities and interests. 2022 Senior Secured Notes On April 15, 2019, the Issuers elected to call for redemption in full all $690 million aggregate principal amount outstanding of the 2022 Senior Secured Notes in accordance with the terms of the Indenture. The redemption was conditioned, among other things, upon the incurrence of indebtedness in connection with the issuance of the 2024 Senior Secured Notes or from one or more other sources, in an amount satisfactory to the Issuers which condition was satisfied by the issuance of the 2024 Senior Secured Notes. On April 25, 2019, the Issuers irrevocably deposited, or caused to be irrevocably deposited, with the Trustee funds solely for the benefit of the holders of the 2022 Senior Secured Notes, cash in an amount sufficient to pay principal, premium, if any, and accrued interest on the 2022 Senior Secured Notes to, but not including, the date of redemption and all other sums payable under the Indenture. The Trustee executed and delivered an acknowledgement of satisfaction, discharge and release, dated as of April 25, 2019, among other documents, with respect to the satisfaction and discharge of the 2022 Senior Secured Notes. On May 15, 2019, the 2022 Senior Secured Notes were fully redeemed in accordance with the terms of the Indenture, and the amount deposited with the Trustee on April 25, 2019 was paid to the holders of the 2022 Senior Secured Notes. The make-whole premium paid in connection with the redemption was $51.4 million and we wrote off the remaining unamortized deferred financing costs of $9.1 million and the remaining debt premium of $11.7 million relating to the 2022 Senior Secured Notes in connection with the redemption thereof, which together are included in the loss on extinguishment of debt in our unaudited condensed consolidated statements of operations for the nine month period ended September 30, 2019. We paid approximately $15.9 million of aggregate origination fees and financing costs related to the issuance of the 2022 Senior Secured Notes which were accounted for as deferred financing costs. Additionally, we paid approximately $1.4 million of consent fees in connection with the Supplemental Indenture, which partially offset the net carrying value of the 2022 Senior Secured Notes. Total amortization expense was $1.0 million for the nine month period ended September 30, 2019, and $0.7 million and $2.0 million, respectively, for the three and nine month periods ended September 30, 2018. As noted above, the remaining unamortized deferred financing costs were written off as of May 15, 2019. Convertible Notes 2022 Convertible Notes On November 21, 2018, we issued $215.0 million aggregate principal amount of 6.00% Convertible Senior Notes due 2022 (the “2022 Convertible Notes”) in private offerings to qualified institutional buyers, including pursuant to Rule 144A under the Securities Act, and in concurrent private placements. We granted an option to the initial purchasers to purchase up to an additional $32.3 million aggregate principal amount of 2022 Convertible Notes to cover over-allotments, of which $22.8 million was subsequently exercised during December 2018, resulting in a total issuance of $237.8 million aggregate principal amount of 2022 Convertible Notes. The 2022 Convertible Notes mature on May 15, 2022, unless earlier repurchased or converted into shares of our common stock under certain circumstances described below. Upon maturity, we have the option to settle our obligation through cash, shares of common stock, or a combination of cash and shares of common stock. We pay interest on the 2022 Convertible Notes semi-annually The $237.8 million of proceeds received from the issuance of the 2022 Convertible Notes was initially allocated between long-term debt (the liability component) at $188.7 million and additional paid-in non-cash As of September 30, 2019 and December 31, 2018, the outstanding principal on the 2022 Convertible Notes was $237.8 million and $237.8 million, respectively, the unaccreted debt discount was $38.9 million and $47.7 million, respectively, and the net carrying amount of the liability component was $198.8 million and $190.1 million, respectively. We incurred approximately $8.1 million of issuance costs related to the issuance of the 2022 Convertible Notes, of which $6.4 million and $1.7 million were recorded to deferred financing costs and additional paid-in The 2022 Convertible Notes had an initial conversion rate of 166.6667 common shares per $1,000 principal amount of 2022 Convertible Notes, which is equivalent to an initial conversion price of approximately $6.00 per share of our common stock. Upon conversion, we currently expect to deliver cash up to the principal amount of the 2022 Convertible Notes then outstanding. With respect to any conversion value in excess of the principal amount, we currently expect to deliver shares of our common stock. We may elect to deliver cash in lieu of all or a portion of such shares. The shares of common stock subject to conversion are excluded from diluted earnings per share calculations under the if-converted Holders may convert the 2022 Convertible Notes, at their option, in multiples of $1,000 principal amount at any time prior to January 15, 2022, but only in the following circumstances: • during any fiscal quarter beginning after the fiscal quarter ended December 31, 2018, if the last reported sale price of our common stock for at least 20 30 130 • during the five five 98 • upon the occurrence of specified corporate events. None of the above events allowing for conversion prior to January 15, 2022 occurred during the three and nine month periods ended September 30, 2019 or the year ended December 31, 2018. Regardless of whether any of the foregoing circumstances occurs, a holder may convert its 2022 Convertible Notes, in multiples of $1,000 principal amount, at any time on or after January 15, 2022 until the second scheduled trading day immediately preceding May 15, 2022. In addition, if we undergo a fundamental change (as defined in the indenture governing the 2022 Convertible Notes), holders may, subject to certain conditions, require us to repurchase their 2022 Convertible Notes for cash at a price equal to 100% of the principal amount of the 2022 Convertible Notes to be purchased, plus any accrued and unpaid interest. In addition, following a make-whole fundamental change, we will increase the conversion rate in certain circumstances for a holder who elects to convert its 2022 Convertible Notes in connection with such make-whole fundamental change. 2020 Convertible Notes On March 3, 2015, we issued $340.0 million aggregate principal amount of 3.75% Convertible Senior Notes due 2020 (the “2020 Convertible Notes”) in a private offering to qualified institutional buyers, pursuant to Rule 144A under the Securities Act. We granted an option to the initial purchasers to purchase up to an additional $60.0 million aggregate principal amount of 2020 Convertible Notes to cover over-allotments, of which $21.9 million was subsequently exercised during March 2015, resulting in a total issuance of $361.9 million aggregate principal amount of 2020 Convertible Notes. The 2020 Convertible Notes mature on March 1, 2020 semi-annually On April 18, 2019, we commenced a cash tender offer (the “Tender Offer”) to purchase any and all of the outstanding 2020 Convertible Notes for an amount equal to $1,000 per $1,000 principal amount of 2020 Convertible Notes purchased, plus accrued and unpaid interest from the last interest payment date on the 2020 Convertible Notes to, but not including, the date of payment for the 2020 Convertible Notes accepted in the Tender Offer. The Tender Offer expired on May 15, 2019, resulting in the purchase of $159.0 million of outstanding 2020 Convertible Notes. As a result of the Tender Offer, the carrying value of the 2020 Convertible Notes was adjusted by $8.5 million to face value and unamortized deferred financing costs of $0.6 million were expensed. These two items are included in the loss on extinguishment of debt in our unaudited condensed consolidated statements of operations for the nine month period ended September 30, 2019. During September 2019, we purchased an additional $ 0.5 The $361.9 million of proceeds received from the issuance of the 2020 Convertible Notes was initially allocated between long-term debt (the liability component) at $261.9 million and additional paid-in non-cash As of September 30, 2019 and December 31, 2018, the outstanding principal on the 2020 Convertible Notes was $2.5 million and $162.0 million, respectively, the unamortized debt discount was zero and $12.8 million, respectively, and the net carrying amount of the liability component was $2.5 million and $149.2 million, respectively. We incurred approximately $10.4 million of issuance costs related to the issuance of the 2020 Convertible Notes, of which $7.5 million and $2.9 million were recorded to deferred financing costs and additional paid-in The 2020 Convertible Notes had an initial conversion rate of 41.9274 common shares per $1,000 principal amount of 2020 Convertible Notes, which is equivalent to an initial conversion price of approximately $23.85 per share of our common stock. Upon conversion, we currently expect to deliver cash up to the principal amount of the 2020 Convertible Notes then outstanding. With respect to any conversion value in excess of the principal amount, we currently expect to deliver shares of our common stock. We may elect to deliver cash in lieu of all or a portion of such shares. The shares of common stock subject to conversion are excluded from diluted earnings per share calculations under the if-converted Holders may convert the 2020 Convertible Notes, at their option, in multiples of $1,000 principal amount at any time prior to December 1, 2019, but only in the following circumstances: • during any fiscal quarter beginning after the fiscal quarter ended June 30, 2015, if the last reported sale price of our common stock for at least 20 30 130 • during the five five 98 • upon the occurrence of specified corporate events. None of the above events allowing for conversion prior to December 1, 2019 occurred during the three and nine month periods ended September 30, 2019 or the year ended December 31, 2018. Regardless of whether any of the foregoing circumstances occurs, a holder may convert its 2020 Convertible Notes, in multiples of $1,000 principal amount, at any time on or after December 1, 2019 until maturity. In addition, if we undergo a fundamental change (as defined in the indenture governing the 2020 Convertible Notes), holders may, subject to certain conditions, require us to repurchase their 2020 Convertible Notes for cash at a price equal to 100% of the principal amount of the 2020 Convertible Notes to be purchased, plus any accrued and unpaid interest. In addition, if specific corporate events occur prior to the maturity date, we will increase the conversion rate for a holder who elects to convert its 2020 Convertible Notes in connection with such a corporate event in certain circumstances. Forward Transactions In connection with the issuance of the 2020 Convertible Notes, we paid approximately $140 million to enter into prepaid forward stock repurchase transactions (the “Forward Transactions”) with certain financial institutions (the “Forward Counterparties”), pursuant to which we purchased approximately 7.2 million shares of common stock for settlement on or around the March 1, 2020 maturity date for the 2020 Convertible Notes, subject to the ability of each Forward Counterparty to elect to settle all or a portion of its Forward Transactions early. In the future, we may request that any Forward Counterparty modify the settlement terms of its Forward Transaction to provide that, in lieu of the delivery of the applicable number of shares of our common stock to us to settle a portion of its Forward Transaction in accordance with its terms, such Forward Counterparty would pay to us the net proceeds from the sale by such Forward Counterparty (or its affiliate) of a corresponding number of shares of our common stock in a registered offering (which may include block sales, sales on the NASDAQ Global Select Market, sales in the over-the-counter , amo ng othe r things, Restricted Cash

Interest Costs

Interest Costs	9 Months Ended
	Sep. 30, 2019
Text Block [Abstract]
Interest Costs	10. Interest Costs We capitalize a portion of our interest on funds borrowed during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and amortized over the useful lives of the assets. The following is a summary of our interest costs for the three and nine month periods ended September 30, 2019 and 2018 (in thousands) For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Interest costs charged to expense $ 26,296 $ 24,887 $ 84,053 $ 74,795 Amortization of deferred financing costs 1,328 1,060 3,901 3,143 Accretion of debt discount 3,116 5,517 12,508 16,109 Amortization of debt premium — (721 ) (1,018 ) (2,109 ) Interest expense 30,740 30,743 99,444 91,938 Interest costs capitalized to property and equipment — 7 11 22 Interest costs capitalized to software 188 101 428 208 Total interest costs $ 30,928 $ 30,851 $ 99,883 $ 92,168

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	11. Leases Operating and Financing Leases 20 years The following is a summary of our lease expense included in the unaudited condensed consolidated statements of operations (in thousands) For the Three For the Nine September 30, 2019 September 30, 2019 Operating lease cost $ 4,878 $ 14,990 Financing lease cost Amortization of leased assets 172 548 Interest on lease liabilities 8 35 Total lease cost $ 5,058 $ 15,573 Other information regarding our leases is as follows (in thousands, except lease terms and discount rates) For the Three For the Nine September 30, 2019 September 30, 2019 Supplemental cash flow information Cash paid for amounts included in measurement of lease liabilities: Operating cash flows used in operating leases $ 5,842 $ 17,750 Operating cash flows used in financing leases 8 35 Financing cash flows used in financing leases 169 552 Right-of-use Operating leases 2,584 3,631 Weighted average remaining lease term Operating leases 8 years Financing leases 1 year Weighted average discount rate Operating leases 10.3 % Financing leases 8.1 % Annual future minimum lease payments as of September 30, 2019 (in thousands) Years ending December 31, Operating Financing 2019 (period from October 1 to December 31) $ 5,733 $ 119 2020 22,030 197 2021 21,763 — 2022 20,109 — 2023 16,246 — Thereafter 76,910 — Total future minimum lease payments 162,791 316 Less: Amount representing interest (54,666 ) (15 ) Present value of net minimum lease payments $ 108,125 $ 301 Reported as of September 30, 2019 Accrued liabilities $ 11,917 $ 295 Non-current 96,208 — Other non-current — 6 Total lease liabilities $ 108,125 $ 301 As of December 31, 2018, annual future minimum obligations for operating leases for each of the next five years and thereafter, were as follows ( in thousands Years ending December 31, Operating 2019 $ 21,902 2020 $ 19,867 2021 $ 19,742 2022 $ 18,420 2023 $ 14,826 Thereafter $ 78,100 Arrangements with Commercial Airlines Under the turnkey model, the assets are recorded as airborne equipment on our unaudited condensed consolidated balance sheets, as noted in Note 6, “Composition of Certain Balance Sheet Accounts.” Any upfront equipment payments are accounted for as lease incentives and recorded as deferred airborne lease incentives on our unaudited condensed consolidated balance sheets and are recognized as a reduction of the cost of service revenue on a straight-line basis over the term of the agreement with the airline. We recognized $6.3 million and $21.3 million, respectively, for the three and nine month periods ended September 30, 2019 and $8.1 million and $23.2 million, respectively, for the prior-year periods as a reduction to our cost of service revenue in our unaudited condensed consolidated statements of operations. As of September 30, 2019, deferred airborne lease incentives of $25.0 million and $133.3 million, respectively, are included in current and non-current non-current Under the turnkey model, the revenue share paid to our airline partners represents operating lease payments. They are deemed to be contingent rental payments, as the payments due to each airline are based on a percentage of our CA-NA CA-ROW

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Contractual Commitments We have agreements with various vendors under which we have remaining commitments to purchase satellite-based systems, certifications and development services. Such commitments will become payable as we receive the equipment or certifications, or as development services are provided. Damages and Penalties— Indemnifications and Guarantees In the ordinary course of business we may occasionally enter into agreements pursuant to which we may be obligated to pay for the failure of the performance of others, such as the use of corporate credit cards issued to employees. Based on historical experience, we believe that the risk of sustaining any material loss related to such guarantees is remote. We have entered into a number of agreements, including our agreements with commercial airlines, pursuant to which we indemnify the other party for losses and expenses suffered or incurred in connection with any patent, copyright, or trademark infringement or misappropriation claim asserted by a third party with respect to our equipment or services. The maximum potential amount of future payments we could be required to make under these indemnification agreements is uncertain and is typically not limited by the terms of the agreements. Linksmart Litigation — April 20, 2018 inter partes inter partes Securities Litigation — June 27, 2018 10b-5 Derivative Litigation - September 25, 2018 and September 26, 2018

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities	13. Fair Value of Financial Assets and Liabilities A three-tier fair value hierarchy has been established which prioritizes the inputs used in measuring fair value. These tiers include: • Level 1 • Level 2 • Level 3 Long-Term Debt: Our financial assets and liabilities that are disclosed but not measured at fair value include the 2024 Senior Secured Notes, 2022 Convertible Notes, 2020 Convertible Notes and, while outstanding, the 2022 Senior Secured Notes, which are reflected on the unaudited condensed consolidated balance sheet at cost. The fair value measurements are classified as Level 2 within the fair value hierarchy since they are based on quoted market prices of our instruments in markets that are not active. We estimated the fair value of the 2024 Senior Secured Notes, 2022 Convertible Notes, 2020 Convertible Notes, and, while outstanding, the 2022 Senior Secured Notes by calculating the upfront cash payment a market participant would require to assume these obligations. The upfront cash payment used in the calculations of fair value on our September 30, 2019 unaudited condensed consolidated balance sheet, excluding any issuance costs, is the amount that a market participant would be willing to lend at September 30, 2019 to an entity with a credit rating similar to ours and achieve sufficient cash inflows to cover the scheduled cash outflows under the 2024 Senior Secured Notes, 2022 Convertible Notes and 2020 Convertible Notes. The calculated fair value of our 2022 Convertible Notes and 2020 Convertible Notes is correlated to our stock price and as a result, significant changes to our stock price could have a significant impact on their calculated fair values. The fair value and carrying value of long-term debt as of September 30, 2019 and December 31, 2018 were as follows (in thousands) September 30, 2019 December 31, 2018 Fair Value (1) Carrying Fair Value (1) Carrying 2024 Senior Secured Notes $ 999,000 $ 920,965 (2) $ — $ — 2022 Senior Secured Notes — — 737,000 702,670 (3) 2022 Convertible Notes 284,000 198,818 (4) 216,000 190,083 (4) 2020 Convertible Notes 2,498 2,498 150,000 149,195 (5) (1) Fair value amounts are rounded to the nearest million, except for the 2020 Convertible Notes , (2) Carrying value of the 2024 Senior Secured Notes reflects the unaccreted debt discount of $ 4.0 (3) Carrying value of the 2022 Senior Secured Notes reflects the unamortized debt premium and Consent Fees of $ 12.7 (4) Carrying value of the 2022 Convertible Notes reflects the unaccreted debt discount of $ 38.9 47.7 (5) Carrying value of the 2020 Convertible Notes reflects the unaccreted debt discount of $ 12.8 We have held-to-maturity no .

Income Tax

Income Tax	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax	14. Income Tax The effective income tax rates for the three and nine month periods ended September 30, 2019 were (0.9)% and (0.6)%, respectively, as compared with (0.5)% and 3.3%, respectively, for the prior-year periods. For the three and nine month periods ended September 30, 2019, our income tax expense was not significant primarily due to the recording of a valuation allowance against our net deferred tax assets. An income tax benefit was recorded for the nine month period ended September 30, 2018 resulting from a reduction in our valuation allowance of approximately $4.0 million due to the application of provisions of H.R. 1, commonly known as the Tax Cuts and Jobs Act (“U.S. Tax Reform”), to our evaluation of our deferred tax assets. We are subject to income taxation in the United States, various states within the United States, Canada, Switzerland, Japan, Mexico, Brazil, Singapore, the United Kingdom, Hong Kong, Australia, China, India, France, Germany and the Netherlands. With few exceptions, as of September 30, 2019, we are no longer subject to U.S. federal, state, local or foreign examinations by tax authorities for years before 2015. We record penalties and interest relating to uncertain tax positions in the income tax provision line item in the unaudited condensed consolidated statement of operations. No no We do no

Business Segments and Major Cus

Business Segments and Major Customers	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Business Segments and Major Customers	15. Business Segments and Major Customers We operate our business through three operating segments: Commercial Aviation North America, or “CA-NA,” “CA-ROW,” The accounting policies of the operating segments are the same as those described in Note 2, “Summary of Significant Accounting Policies,” in our 2018 10-K. Management evaluates performance and allocates resources to each segment based on segment profit (loss), which is calculated internally as net income (loss) attributable to common stock before interest expense, interest income, income taxes, depreciation and amortization, certain non-cash 280-10, Segment Reporting Information regarding our reportable segments is as follows ( in thousands For the Three Months Ended September 30, 2019 CA-ROW BA Total Service revenue $ 80,470 $ 22,580 $ 55,349 $ 158,399 Equipment revenue 3,665 13,127 25,991 42,783 Total revenue $ 84,135 $ 35,707 $ 81,340 $ 201,182 Segment profit (loss) $ 12,208 $ (13,659 ) $ 36,951 $ 35,500 For the Three Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue $ 93,443 $ 17,646 $ 49,287 $ 160,376 Equipment revenue 15,027 17,551 24,303 56,881 Total revenue $ 108,470 $ 35,197 $ 73,590 $ 217,257 Segment profit (loss) $ 8,699 $ (22,747 ) $ 35,178 $ 21,130 For the Nine Months Ended September 30, 2019 Service revenue $ 268,899 $ 64,925 $ 163,318 $ 497,142 Equipment revenue 17,032 40,430 59,812 117,274 Total revenue $ 285,931 $ 105,355 $ 223,130 $ 614,416 Segment profit (loss) $ 59,921 $ (50,073 ) $ 101,739 $ 111,587 For the Nine Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue $ 277,972 $ 47,076 $ 145,062 $ 470,110 Equipment revenue (1) 93,969 40,935 71,526 206,430 Total revenue $ 371,941 $ 88,011 $ 216,588 $ 676,540 Segment profit (loss) $ 17,396 $ (69,826 ) $ 104,180 $ 51,750 (1) CA-NA A reconciliation of segment profit (loss) to the relevant consolidated amounts is as follows ( in thousands For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 CA-NA $ 12,208 $ 8,699 $ 59,921 $ 17,396 CA-ROW (13,659 ) (22,747 ) (50,073 ) (69,826 ) BA segment profit 36,951 35,178 101,739 104,180 Total segment profit 35,500 21,130 111,587 51,750 Interest income 987 903 3,366 3,307 Interest expense (30,740 ) (30,743 ) (99,444 ) (91,938 ) Depreciation and amortization (29,292 ) (32,590 ) (90,008 ) (100,447 ) Transition to airline-directed model — — — 21,551 Amortization of deferred airborne lease incentives (1) 6,335 8,074 21,365 23,166 Amortization of STC costs (1,259 ) (292 ) (1,901 ) (719 ) Stock-based compensation expense (4,066 ) (3,932 ) (12,711 ) (12,531 ) Loss on extinguishment of debt — — (57,962 ) — Other income (expense) (143 ) (72 ) 2,779 59 Loss before income taxes $ (22,678 ) $ (37,522 ) $ (122,929 ) $ (105,802 ) (1) Amortization of deferred airborne lease incentive relates to our CA-NA CA-ROW Major Customers and Airline Partnerships 30, 2019 and approximately 25% and 23%, respectively, for the prior-year periods. Delta Air Lines accounted for less than 10% of consolidated accounts receivable as of September 30, 2019 and approximately 11% of consolidated accounts receivable as of December 31, 2018. Revenue earned from American Airlines accounted for less than 10% of consolidated revenue for both the three and nine month periods ended September 30, 2019 and approximately 18% and 25% of consolidated revenue, respectively, for the prior-year periods. Revenue earned from American Airlines for the nine month period ended September 30, 2018 included $45.4 million of equipment revenue recognized due to the airline’s transition to the airline-directed model in January 2018. See Note 1, “Basis of Presentation,” for additional information. American Airlines accounted for less than 10% of consolidated accounts receivable as of September 30, 2019 and approximately 11% of consolidated accounts receivable as of December 31, 2018.

Employee Retirement and Postret

Employee Retirement and Postretirement Benefits	9 Months Ended
	Sep. 30, 2019
Text Block [Abstract]
Employee Retirement and Postretirement Benefits	16. Employee Retirement and Postretirement Benefits Stock-Based Compensation — 10-K For the nine month period ended September 30, 2019, options to purchase 1,455,455 shares of common stock (of which 148,500 are options that contain a market condition, in addition to the time-based vesting requirements) were granted, no options to purchase shares of common stock were exercised, options to purchase 478,147 (of which 230,221 options contain a market condition) shares of common stock were forfeited, and options to purchase 561,582 shares of common stock expired. For the nine month period ended September 30, 2019, 2,000,338 Restricted Stock Units (“RSUs”) (of which 86,000 are RSUs that contain a market condition, in addition to the time-based vesting requirements) were granted, 466,886 RSUs vested and 447,503 RSUs (of which 64,445 contained a market condition) were forfeited. For the nine month period ended September 30, 2019, 66,174 restricted shares vested. These shares are deemed issued as of the date of grant, but not outstanding until they vest. For the nine month period ended September 30, 2019, 161,833 Deferred Stock Units were granted and vested. For the nine month period ended September 30, 2019, 238,127 shares of common stock were issued under the employee stock purchase plan. The following is a summary of our stock-based compensation expense by operating expense line in the unaudited condensed consolidated statements of operations (in thousands) For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Cost of service revenue $ 394 $ 303 $ 1,196 $ 1,184 Cost of equipment revenue 60 33 211 146 Engineering, design and development 717 812 2,271 2,505 Sales and marketing 849 901 2,786 3,209 General and administrative 2,046 1,883 6,247 5,487 Total stock-based compensation expense $ 4,066 $ 3,932 $ 12,711 $ 12,531 401(k) Plan tax-deferred

Research and Development Costs

Research and Development Costs	9 Months Ended
	Sep. 30, 2019
Research and Development [Abstract]
Research and Development Costs	17. Research and Development Costs Expenditures for research and development are charged to expense as incurred and totaled $21.2 million and $52.9 million, respectively, during the three and nine month periods ended September 30, 2019, and $19.2 million and $56.3 million, respectively, for the prior-year periods. Research and development costs are reported as a component of engineering, design and development expenses in our unaudited condensed consolidated statements of operations.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	The Business - in-flight “CA-NA,” “CA-ROW,” CA-NA CA-ROW Wi-Fi-enabled in-flight Wi-Fi CA-NA CA-ROW CA-ROW in-flight in-flight in-flight in-flight Basis of Presentation— S-X 10-K 10-K”). The results of operations and cash flows for the three and nine month periods ended September 30, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019. We have one class of common stock outstanding as of September 30, 2019 and December 31, 2018.
Reclassifications	Reclassifications
Transition to airline-directed model	Transition of airline models non-current non-current non-current warranty reserves related to previously sold equipment that are still under a warranty period, which is included within accrued liabilities. See Note 8, “Warranties,” for additional information. This transition from the turnkey model to the airline-directed model occurred on January , and in thousands Increase Unaudited condensed consolidated balance sheet Prepaid expense and other current assets $ 6,603 Property and equipment, net (32,716 ) Other non-current 18,783 Accrued liabilities 2,000 Current deferred airborne lease incentive (13,592 ) Non-current (17,289 ) Unaudited condensed consolidated statement of operations Equipment revenue 45,396 Cost of equipment revenue 23,845 As of January 1, 2019, one airline transitioned from the airline-directed model to the turnkey model. This transition did not have a material impact to our unaudited condensed consolidated statements of operations. However, as a result of such transition, $46.8 million of Inventory was reclassified to Property and equipment, net as of January 1, 2019. See Note 2, “Summary of Significant Accounting Policies — 10-K non-current right-of-use
Use of Estimates	Use of Estimates —

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Financial Effects Due to Transition of Agreements	the total financial statement effect on our unaudited condensed consolidated balance sheet and unaudited condensed consolidated statement of operations was as follows ( in thousands Increase Unaudited condensed consolidated balance sheet Prepaid expense and other current assets $ 6,603 Property and equipment, net (32,716 ) Other non-current 18,783 Accrued liabilities 2,000 Current deferred airborne lease incentive (13,592 ) Non-current (17,289 ) Unaudited condensed consolidated statement of operations Equipment revenue 45,396 Cost of equipment revenue 23,845

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2019
Accounting Changes and Error Corrections [Abstract]
Summary of Adoption Impact of ASC 842 on Unaudited Condensed Consolidated Balance Sheet	Balance at Impact of Balances with Assets Operating lease right-of-use $ — $ 72,188 $ 72,188 Liabilities Accrued liabilities 213,111 9,019 222,130 Non-current — 102,440 102,440 Other non-current 80,191 (36,178 ) 44,013 Equity Accumulated deficit (1,228,674 ) (3,093 ) (1,231,767 )

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2019
Summary of Revenue Disaggregated by Category	The following table presents our revenue disaggregated by category (in thousands) For the Three Months Ended September 30, 2019 CA-NA CA-ROW BA Total Service revenue Connectivity $ 73,222 $ 21,580 $ 54,698 $ 149,500 Entertainment, CAS and other 7,248 1,000 651 8,899 Total service revenue $ 80,470 $ 22,580 $ 55,349 $ 158,399 Equipment revenue ATG $ 2,247 $ — $ 20,099 $ 22,346 Satellite 1,178 13,127 5,292 19,597 Other 240 — 600 840 Total equipment revenue $ 3,665 $ 13,127 $ 25,991 $ 42,783 Customer type Airline passenger and aircraft owner/operator $ 45,744 $ 7,204 $ 55,349 $ 108,297 Airline, OEM and aftermarket dealer 28,258 26,400 25,991 80,649 Third party 10,133 2,103 — 12,236 Total revenue $ 84,135 $ 35,707 $ 81,340 $ 201,182 For the Three Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue Connectivity $ 85,930 $ 17,168 $ 48,926 $ 152,024 Entertainment, CAS and other 7,513 478 361 8,352 Total service revenue $ 93,443 $ 17,646 $ 49,287 $ 160,376 Equipment revenue ATG $ 2,518 $ — $ 20,158 $ 22,676 Satellite 12,509 17,551 4,022 34,082 Other — — 123 123 Total equipment revenue $ 15,027 $ 17,551 $ 24,303 $ 56,881 Customer type Airline passenger and aircraft owner/operator $ 53,873 $ 6,086 $ 49,287 $ 109,246 Airline, OEM and aftermarket dealer 39,336 27,146 24,303 90,785 Third party 15,261 1,965 — 17,226 Total revenue $ 108,470 $ 35,197 $ 73,590 $ 217,257 For the Nine Months Ended September 30, 2019 CA-NA CA-ROW BA Total Service revenue Connectivity $ 243,273 $ 62,090 $ 161,559 $ 466,922 Entertainment, CAS and other 25,626 2,835 1,759 30,220 Total service revenue $ 268,899 $ 64,925 $ 163,318 $ 497,142 Equipment revenue ATG $ 10,755 $ — $ 43,778 $ 54,533 Satellite 5,137 40,430 14,336 59,903 Other 1,140 — 1,698 2,838 Total equipment revenue $ 17,032 $ 40,430 $ 59,812 $ 117,274 Customer type Airline passenger and aircraft owner/operator $ 155,993 $ 19,822 $ 163,318 $ 339,133 Airline, OEM and aftermarket dealer 96,054 79,571 59,812 235,437 Third party 33,884 5,962 — 39,846 Total revenue $ 285,931 $ 105,355 $ 223,130 $ 614,416 For the Nine Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue Connectivity $ 256,803 $ 45,365 $ 144,149 $ 446,317 Entertainment, CAS and other 21,169 1,711 913 23,793 Total service revenue $ 277,972 $ 47,076 $ 145,062 $ 470,110 Equipment revenue ATG (1) $ 49,534 $ — $ 56,076 $ 105,610 Satellite (1) 44,435 40,935 12,741 98,111 Other — — 2,709 2,709 Total equipment revenue $ 93,969 $ 40,935 $ 71,526 $ 206,430 Customer type Airline passenger and aircraft owner/operator $ 161,515 $ 15,912 $ 145,062 $ 322,489 Airline, OEM and aftermarket dealer (2) 165,903 66,151 71,526 303,580 Third party 44,523 5,948 — 50,471 Total revenue $ 371,941 $ 88,011 $ 216,588 $ 676,540 1) ATG and satellite equipment revenue for the CA-NA 2) Airline, OEM and aftermarket dealer revenue includes all equipment revenue for our three segments, including the $45.4 million accounting impact of the transition of one of our airline partners to the airline-directed model.

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three and nine month periods ended September 30, 2019 and 2018; however, because of the undistributed losses, the shares of common stock associated with the Forward Transactions are excluded from the computation of basic earnings per share in 2019 and 2018 as undistributed losses are not allocated to these shares ( in thousands, except per share amounts For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Net loss $ (22,891 ) $ (37,717 ) $ (123,653 ) $ (102,343 ) Less: Participation rights of the Forward Transactions — — — — Undistributed losses $ (22,891 ) $ (37,717 ) $ (123,653 ) $ (102,343 ) Weighted-average common shares outstanding-basic and diluted 80,908 80,196 80,370 79,948 Net loss attributable to common stock per share-basic and diluted $ (0.28 ) $ (0.47 ) $ (1.54 ) $ (1.28 )

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Components of Inventories	Inventories as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Work-in-process $ 27,644 $ 30,340 Finished goods (1) 105,769 162,705 Total inventory $ 133,413 $ 193,045 (1) The change between September 30, 2019 and December 31, 2018 includes the $ 46.8

Composition of Certain Balanc_2

Composition of Certain Balance Sheet Accounts (Tables)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Contract assets $ 11,518 $ 10,423 Prepaid satellite services 1,026 7,755 Restricted cash 535 1,535 Other 11,939 14,982 Total prepaid expenses and other current assets $ 25,018 $ 34,695
Property and Equipment	Property and equipment as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Office equipment, furniture, fixtures and other $ 54,833 $ 52,320 Leasehold improvements 44,832 44,838 Airborne equipment (1) 737,999 642,151 Network equipment 209,501 205,463 1,047,165 944,772 Accumulated depreciation (494,125 ) (432,905 ) Total property and equipment, net $ 553,040 $ 511,867 (1) The change between September 30, 2019 and December 31, 2018 includes the $46.8 million accounting impact of one of our airline partner agreements transitioning to the turnkey model in January 2019 (see Note 1, “Basis of Presentation,” for additional information).
Schedule of Other Non-Current Assets	Other non-current in thousands September 30, December 31, 2019 2018 Contract assets $ 49,796 $ 49,517 Deferred STC costs 17,618 16,453 Restricted cash 7,424 5,426 Other 8,831 12,816 Total other non-current $ 83,669 $ 84,212
Accrued Liabilities	Accrued liabilities as of September 30, 2019 and December 31, 2018 were as follows ( in thousands September 30, December 31, 2019 2018 Airline related accrued liabilities $ 44,123 $ 53,527 Accrued interest 44,701 46,694 Employee compensation and benefits 25,330 19,463 Airborne equipment and installation costs 12,851 25,119 Accrued satellite network costs 16,585 19,557 Warranty reserve 11,579 12,291 Operating leases (1) 11,917 — Other 33,667 36,460 Total accrued liabilities $ 200,753 $ 213,111 (1) The change between September 30, 2019 and December 31, 2018 is due to the adoption of ASC 842. See Note 2, “Recent Accounting Pronouncements,” for additional information.
Other Non-Current Liabilities	Other non-current in thousands September 30, December 31, 2019 2018 Deferred revenue $ 30,154 $ 21,482 Deferred rent (1) — 35,897 Asset retirement obligations 11,243 9,696 Deferred tax liabilities 2,295 2,162 Other 10,082 10,954 Total other non-current $ 53,774 $ 80,191 (1) The change between September 30, 2019 and December 31, 2018 is due to the adoption of ASC 842. See Note 2, “Recent Accounting Pronouncements,” for additional information.

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets, Other than Goodwill	Our intangible assets, other than goodwill, as of September 30, 2019 and December 31, 2018 were as follows ( in thousands, except for weighted average remaining useful life Weighted Average As of September 30, 2019 As of December 31, 2018 Remaining Gross Net Gross Net Useful Life Carrying Accumulated Carrying Carrying Accumulated Carrying (in years) Amount Amortization Amount Amount Amortization Amount Amortized intangible assets: Software 2.7 $ 176,539 $ (131,144 ) $ 45,395 $ 164,580 $ (116,873 ) $ 47,707 Service customer relationship 0.5 8,081 (7,566 ) 515 8,081 (6,804 ) 1,277 Other intangible assets 7.8 3,000 (1,432 ) 1,568 3,000 (1,396 ) 1,604 OEM and dealer relationships 6,724 (6,724 ) — 6,724 (6,724 ) — Total amortized intangible assets 194,344 (146,866 ) 47,478 182,385 (131,797 ) 50,588 Unamortized intangible assets: FCC Licenses 32,283 — 32,283 32,283 — 32,283 Total intangible assets $ 226,627 $ (146,866 ) $ 79,761 $ 214,668 $ (131,797 ) $ 82,871
Summary of Amortization Expenses	Amortization expense for each of the next five years and thereafter is estimated to be as follows ( in thousands Amortization Years ending December 31, Expense 2019 (period from October 1 to December 31) $ 5,151 2020 $ 18,394 2021 $ 13,573 2022 $ 8,068 2023 $ 1,310 Thereafter $ 982

Long-Term Debt and Other Liab_2

Long-Term Debt and Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt as of September 30, 2019 and December 31, 2018 was as follows ( in thousands September 30, December 31, 2019 2018 2024 Senior Secured Notes $ 920,965 $ — 2022 Senior Secured Notes — 702,670 2022 Convertible Notes 198,818 190,083 2020 Convertible Notes 2,498 149,195 Total debt 1,122,281 1,041,948 Less deferred financing costs (26,115 ) (17,055 ) Total long-term debt $ 1,096,166 $ 1,024,893
Summary of Redemption Prices Plus Accrued and Unpaid Interest	the 2024 Senior Secured Notes will be redeemable at the following redemption prices (expressed in percentages of principal amount), plus accrued and unpaid interest, if any, to (but not including) the redemption date (subject to the right of holders of record on the relevant regular record date on or prior to the redemption date to receive interest due on an interest payment date), if redeemed during the twelve-month period commencing on May 1 of the following years: Year Redemption 2021 104.938 % 2022 102.469 % 2023 and thereafter 100.000 %

Interest Costs (Tables)

Interest Costs (Tables)	9 Months Ended
	Sep. 30, 2019
Text Block [Abstract]
Summary of Interest Costs	The following is a summary of our interest costs for the three and nine month periods ended September 30, 2019 and 2018 (in thousands) For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Interest costs charged to expense $ 26,296 $ 24,887 $ 84,053 $ 74,795 Amortization of deferred financing costs 1,328 1,060 3,901 3,143 Accretion of debt discount 3,116 5,517 12,508 16,109 Amortization of debt premium — (721 ) (1,018 ) (2,109 ) Interest expense 30,740 30,743 99,444 91,938 Interest costs capitalized to property and equipment — 7 11 22 Interest costs capitalized to software 188 101 428 208 Total interest costs $ 30,928 $ 30,851 $ 99,883 $ 92,168

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease expense included in the unaudited condensed consolidated statements of operations	The following is a summary of our lease expense included in the unaudited condensed consolidated statements of operations (in thousands) For the Three For the Nine September 30, 2019 September 30, 2019 Operating lease cost $ 4,878 $ 14,990 Financing lease cost Amortization of leased assets 172 548 Interest on lease liabilities 8 35 Total lease cost $ 5,058 $ 15,573
Schedule Includes Other information About Leases	Other information regarding our leases is as follows (in thousands, except lease terms and discount rates) For the Three For the Nine September 30, 2019 September 30, 2019 Supplemental cash flow information Cash paid for amounts included in measurement of lease liabilities: Operating cash flows used in operating leases $ 5,842 $ 17,750 Operating cash flows used in financing leases 8 35 Financing cash flows used in financing leases 169 552 Right-of-use Operating leases 2,584 3,631 Weighted average remaining lease term Operating leases 8 years Financing leases 1 year Weighted average discount rate Operating leases 10.3 % Financing leases 8.1 %
Annual future minimum lease payments	Annual future minimum lease payments as of September 30, 2019 (in thousands) Years ending December 31, Operating Financing 2019 (period from October 1 to December 31) $ 5,733 $ 119 2020 22,030 197 2021 21,763 — 2022 20,109 — 2023 16,246 — Thereafter 76,910 — Total future minimum lease payments 162,791 316 Less: Amount representing interest (54,666 ) (15 ) Present value of net minimum lease payments $ 108,125 $ 301 Reported as of September 30, 2019 Accrued liabilities $ 11,917 $ 295 Non-current 96,208 — Other non-current — 6 Total lease liabilities $ 108,125 $ 301 As of December 31, 2018, annual future minimum obligations for operating leases for each of the next five years and thereafter, were as follows ( in thousands Years ending December 31, Operating 2019 $ 21,902 2020 $ 19,867 2021 $ 19,742 2022 $ 18,420 2023 $ 14,826 Thereafter $ 78,100

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Summary of Fair Value and Carrying Value of Long-Term Debt	The fair value and carrying value of long-term debt as of September 30, 2019 and December 31, 2018 were as follows (in thousands) September 30, 2019 December 31, 2018 Fair Value (1) Carrying Fair Value (1) Carrying 2024 Senior Secured Notes $ 999,000 $ 920,965 (2) $ — $ — 2022 Senior Secured Notes — — 737,000 702,670 (3) 2022 Convertible Notes 284,000 198,818 (4) 216,000 190,083 (4) 2020 Convertible Notes 2,498 2,498 150,000 149,195 (5) (1) Fair value amounts are rounded to the nearest million, except for the 2020 Convertible Notes , (2) Carrying value of the 2024 Senior Secured Notes reflects the unaccreted debt discount of $ 4.0 (3) Carrying value of the 2022 Senior Secured Notes reflects the unamortized debt premium and Consent Fees of $ 12.7 (4) Carrying value of the 2022 Convertible Notes reflects the unaccreted debt discount of $ 38.9 47.7 (5) Carrying value of the 2020 Convertible Notes reflects the unaccreted debt discount of $ 12.8

Business Segments and Major C_2

Business Segments and Major Customers (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Summary of Reportable Segments	Information regarding our reportable segments is as follows ( in thousands For the Three Months Ended September 30, 2019 CA-ROW BA Total Service revenue $ 80,470 $ 22,580 $ 55,349 $ 158,399 Equipment revenue 3,665 13,127 25,991 42,783 Total revenue $ 84,135 $ 35,707 $ 81,340 $ 201,182 Segment profit (loss) $ 12,208 $ (13,659 ) $ 36,951 $ 35,500 For the Three Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue $ 93,443 $ 17,646 $ 49,287 $ 160,376 Equipment revenue 15,027 17,551 24,303 56,881 Total revenue $ 108,470 $ 35,197 $ 73,590 $ 217,257 Segment profit (loss) $ 8,699 $ (22,747 ) $ 35,178 $ 21,130 For the Nine Months Ended September 30, 2019 Service revenue $ 268,899 $ 64,925 $ 163,318 $ 497,142 Equipment revenue 17,032 40,430 59,812 117,274 Total revenue $ 285,931 $ 105,355 $ 223,130 $ 614,416 Segment profit (loss) $ 59,921 $ (50,073 ) $ 101,739 $ 111,587 For the Nine Months Ended September 30, 2018 CA-NA CA-ROW BA Total Service revenue $ 277,972 $ 47,076 $ 145,062 $ 470,110 Equipment revenue (1) 93,969 40,935 71,526 206,430 Total revenue $ 371,941 $ 88,011 $ 216,588 $ 676,540 Segment profit (loss) $ 17,396 $ (69,826 ) $ 104,180 $ 51,750 (1) CA-NA
Reconciliation of Segment Profit (loss)	A reconciliation of segment profit (loss) to the relevant consolidated amounts is as follows ( in thousands For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 CA-NA $ 12,208 $ 8,699 $ 59,921 $ 17,396 CA-ROW (13,659 ) (22,747 ) (50,073 ) (69,826 ) BA segment profit 36,951 35,178 101,739 104,180 Total segment profit 35,500 21,130 111,587 51,750 Interest income 987 903 3,366 3,307 Interest expense (30,740 ) (30,743 ) (99,444 ) (91,938 ) Depreciation and amortization (29,292 ) (32,590 ) (90,008 ) (100,447 ) Transition to airline-directed model — — — 21,551 Amortization of deferred airborne lease incentives (1) 6,335 8,074 21,365 23,166 Amortization of STC costs (1,259 ) (292 ) (1,901 ) (719 ) Stock-based compensation expense (4,066 ) (3,932 ) (12,711 ) (12,531 ) Loss on extinguishment of debt — — (57,962 ) — Other income (expense) (143 ) (72 ) 2,779 59 Loss before income taxes $ (22,678 ) $ (37,522 ) $ (122,929 ) $ (105,802 ) (1) Amortization of deferred airborne lease incentive relates to our CA-NA CA-ROW

Employee Retirement and Postr_2

Employee Retirement and Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2019
Text Block [Abstract]
Summary of Stock-Based Compensation Expense by Operating Expense	The following is a summary of our stock-based compensation expense by operating expense line in the unaudited condensed consolidated statements of operations (in thousands) For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Cost of service revenue $ 394 $ 303 $ 1,196 $ 1,184 Cost of equipment revenue 60 33 211 146 Engineering, design and development 717 812 2,271 2,505 Sales and marketing 849 901 2,786 3,209 General and administrative 2,046 1,883 6,247 5,487 Total stock-based compensation expense $ 4,066 $ 3,932 $ 12,711 $ 12,531

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)SegmentClassOfCommonStock	Dec. 31, 2018USD ($)ClassOfCommonStock	Jan. 01, 2019USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Property, Plant and Equipment, Net	$ 553,040	$ 511,867
Number Of Classes Of Common Stock Outstanding | ClassOfCommonStock	1	1
Number of Operating Segments | Segment	3
Current Financing Lease Liabilities [Member] | Previously Reported [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Accrued Liabilities		$ 652
Air Line Inventory [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Property, Plant and Equipment, Net			$ 46,800

Basis of Presentation - Summary

Basis of Presentation - Summary of Financial Effects Due to Transition of Agreements (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Prepaid expense and other current assets	$ 25,018		$ 25,018		$ 34,695
Property and equipment, net	(553,040)		(553,040)		(511,867)
Other non-current assets	83,669		83,669		84,212
Accrued liabilities	200,753		200,753		213,111
Current deferred airborne lease incentive	24,954		24,954		24,145
Non-current deferred airborne lease incentive	133,328		133,328		$ 129,086
Equipment revenue	201,182	$ 217,257	614,416	$ 676,540
Cost of equipment revenue	28,830	$ 53,960	94,132	$ 170,603
Transition Agreements To Airline-directed Model [Member]
Prepaid expense and other current assets	6,603		6,603
Property and equipment, net	(32,716)		(32,716)
Other non-current assets	18,783		18,783
Accrued liabilities	2,000		2,000
Current deferred airborne lease incentive	(13,592)		(13,592)
Non-current deferred airborne lease incentive	$ (17,289)		(17,289)
Equipment revenue			45,396
Cost of equipment revenue			$ 23,845

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - Summary of Adoption Impact of ASC 842 on Unaudited Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets
Operating lease right-of-use assets	$ 84,483
Liabilities
Accrued liabilities	200,753		$ 213,111
Non-current operating lease liabilities	96,208
Other non-current liabilities	53,774		80,191
Equity
Accumulated deficit	(1,355,420)		$ (1,228,674)
Accounting Standards Update 2016-02 [Member]
Assets
Operating lease right-of-use assets		$ 72,188
Liabilities
Accrued liabilities		222,130
Non-current operating lease liabilities		102,440
Other non-current liabilities		44,013
Equity
Accumulated deficit		$ (1,231,767)
Difference between Guidance in Effect Before and after Topic 606 and ASC 34040 [Member] | Accounting Standards Update 2016-02 [Member]
Assets
Operating lease right-of-use assets	72,188
Liabilities
Accrued liabilities	9,019
Non-current operating lease liabilities	102,440
Other non-current liabilities	(36,178)
Equity
Accumulated deficit	$ (3,093)

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Revenue from Contracts with Customers [Line Items]
Transaction price allocated to remaining performance obligations	$ 551		$ 551
Service revenue occurring period			1 year
Future equipment revenue recognition period			next one to three years
Future Equipment Revenue [Member]
Revenue from Contracts with Customers [Line Items]
Equipment revenue			$ 79
Connectivity and Entertainment Service Revenues [Member]
Revenue from Contracts with Customers [Line Items]
Transaction price allocated to remaining performance obligations	472		472
Airline [Member]
Revenue from Contracts with Customers [Line Items]
Contract assets, current and non-current	61.3		61.3		$ 59.9
Accounting Standards Update 2014-09 [Member]
Revenue from Contracts with Customers [Line Items]
Deferred revenue, current and non-current	62.7		62.7		60.1
Deferred STC costs	17.6		17.6		$ 16.5
Accounting Standards Update 2014-09 [Member] | Engineering, Design and Development [Member]
Revenue from Contracts with Customers [Line Items]
Amortization expense	$ 1.3	$ 0.3	$ 1.9	$ 0.7

Revenue Recognition - Summary o

Revenue Recognition - Summary of Revenue Disaggregated by Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	$ 201,182	$ 217,257	$ 614,416	$ 676,540
Airline Passenger and Aircraft Owner/Operator [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	108,297	109,246	339,133	322,489
Airline, OEM and Aftermarket Dealer [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	80,649	90,785	235,437	303,580
Third Party [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	12,236	17,226	39,846	50,471
Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	158,399	160,376	497,142	470,110
Service Revenue [Member] | Connectivity [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	149,500	152,024	466,922	446,317
Service Revenue [Member] | Entertainment, CAS and Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	8,899	8,352	30,220	23,793
Equipment Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	42,783	56,881	117,274	206,430
Equipment Revenue [Member] | ATG [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	22,346	22,676	54,533	105,610
Equipment Revenue [Member] | Satellite [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	19,597	34,082	59,903	98,111
Equipment Revenue [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	840	123	2,838	2,709
CA-NA [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	84,135	108,470	285,931	371,941
CA-NA [Member] | Airline Passenger and Aircraft Owner/Operator [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	45,744	53,873	155,993	161,515
CA-NA [Member] | Airline, OEM and Aftermarket Dealer [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	28,258	39,336	96,054	165,903
CA-NA [Member] | Third Party [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	10,133	15,261	33,884	44,523
CA-NA [Member] | Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	80,470	93,443	268,899	277,972
CA-NA [Member] | Service Revenue [Member] | Connectivity [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	73,222	85,930	243,273	256,803
CA-NA [Member] | Service Revenue [Member] | Entertainment, CAS and Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	7,248	7,513	25,626	21,169
CA-NA [Member] | Equipment Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	3,665	15,027	17,032	93,969
CA-NA [Member] | Equipment Revenue [Member] | ATG [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	2,247	2,518	10,755	49,534
CA-NA [Member] | Equipment Revenue [Member] | Satellite [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	1,178	12,509	5,137	44,435
CA-NA [Member] | Equipment Revenue [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	240		1,140
CA-ROW [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	35,707	35,197	105,355	88,011
CA-ROW [Member] | Airline Passenger and Aircraft Owner/Operator [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	7,204	6,086	19,822	15,912
CA-ROW [Member] | Airline, OEM and Aftermarket Dealer [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	26,400	27,146	79,571	66,151
CA-ROW [Member] | Third Party [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	2,103	1,965	5,962	5,948
CA-ROW [Member] | Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	22,580	17,646	64,925	47,076
CA-ROW [Member] | Service Revenue [Member] | Connectivity [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	21,580	17,168	62,090	45,365
CA-ROW [Member] | Service Revenue [Member] | Entertainment, CAS and Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	1,000	478	2,835	1,711
CA-ROW [Member] | Equipment Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	13,127	17,551	40,430	40,935
CA-ROW [Member] | Equipment Revenue [Member] | Satellite [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	13,127	17,551	40,430	40,935
BA [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	81,340	73,590	223,130	216,588
BA [Member] | Airline Passenger and Aircraft Owner/Operator [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	55,349	49,287	163,318	145,062
BA [Member] | Airline, OEM and Aftermarket Dealer [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	25,991	24,303	59,812	71,526
BA [Member] | Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	55,349	49,287	163,318	145,062
BA [Member] | Service Revenue [Member] | Connectivity [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	54,698	48,926	161,559	144,149
BA [Member] | Service Revenue [Member] | Entertainment, CAS and Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	651	361	1,759	913
BA [Member] | Equipment Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	25,991	24,303	59,812	71,526
BA [Member] | Equipment Revenue [Member] | ATG [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	20,099	20,158	43,778	56,076
BA [Member] | Equipment Revenue [Member] | Satellite [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	5,292	4,022	14,336	12,741
BA [Member] | Equipment Revenue [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue	$ 600	$ 123	$ 1,698	$ 2,709

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Revenue Disaggregated by Category (Parenthetical) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)Segment
Disaggregation of Revenue [Line Items]
Number of operating segments | Segment	3
ATG [Member] | CA-NA [Member]
Disaggregation of Revenue [Line Items]
Equipment revenue	$ 43.4
Satellite [Member] | CA-NA [Member]
Disaggregation of Revenue [Line Items]
Equipment revenue	2
Airline, OEM and Aftermarket Dealer [Member] | Product [Member] | Transition Agreements To Airline-directed Model [Member] | CA-NA [Member]
Disaggregation of Revenue [Line Items]
Equipment revenue	45.4
Airline Partners [Member] | Product [Member] | Transition Agreements To Airline-directed Model [Member] | CA-NA [Member]
Disaggregation of Revenue [Line Items]
Equipment revenue	$ 45.4

Net Loss Per Share - Additional

Net Loss Per Share - Additional Information (Detail) - shares shares in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Forward stock repurchase transaction shares, excluded from dilution effect	7.2	7.2

Net Loss Per Share - Computatio

Net Loss Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net loss	$ (22,891)	$ (37,717)	$ (123,653)	$ (102,343)
Less: Participation rights of the Forward Transactions
Undistributed losses	$ (22,891)	$ (37,717)	$ (123,653)	$ (102,343)
Weighted-average common shares outstanding-basic and diluted	80,908	80,196	80,370	79,948
Net loss attributable to common stock per share-basic and diluted	$ (0.28)	$ (0.47)	$ (1.54)	$ (1.28)

Inventories - Components of Inv

Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Work-in-process component parts	$ 27,644	$ 30,340
Finished goods	105,769	162,705
Total inventory	$ 133,413	$ 193,045

Inventories - Components of I_2

Inventories - Components of Inventories (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Inventory [Line Items]
Property and equipment, net	$ 553,040		$ 511,867
Air Line Inventory [Member]
Inventory [Line Items]
Property and equipment, net		$ 46,800

Composition of Certain Balanc_3

Composition of Certain Balance Sheet Accounts - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets [Abstract]
Contract assets	$ 11,518	$ 10,423
Prepaid satellite services	1,026	7,755
Restricted cash	535	1,535
Other	11,939	14,982
Total prepaid expenses and other current assets	$ 25,018	$ 34,695

Composition of Certain Balanc_4

Composition of Certain Balance Sheet Accounts - Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,047,165	$ 944,772
Accumulated depreciation	(494,125)	(432,905)
Total property and equipment, net	553,040	511,867
Office Equipment, Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	54,833	52,320
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	44,832	44,838
Airborne Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	737,999	642,151
Network Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 209,501	$ 205,463

Composition of Certain Balanc_5

Composition of Certain Balance Sheet Accounts - Schedule of Other Non-Current Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other Assets, Noncurrent [Abstract]
Contract assets	$ 49,796	$ 49,517
Deferred STC costs	17,618	16,453
Restricted cash	7,424	5,426
Other	8,831	12,816
Total other non-current assets	$ 83,669	$ 84,212

Composition of Certain Balanc_6

Composition of Certain Balance Sheet Accounts - Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accrued Liabilities, Current [Abstract]
Airline related accrued liabilities	$ 44,123	$ 53,527
Accrued interest	44,701	46,694
Employee compensation and benefits	25,330	19,463
Airborne equipment and installation costs	12,851	25,119
Accrued satellite network costs	16,585	19,557
Warranty reserve	11,579	12,291
Operating leases	11,917
Other	33,667	36,460
Total accrued liabilities	$ 200,753	$ 213,111

Composition of Certain Balanc_7

Composition of Certain Balance Sheet Accounts - Other Non-Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other Liabilities, Noncurrent [Abstract]
Deferred revenue	$ 30,154	$ 21,482
Deferred rent		35,897
Asset retirement obligations	11,243	9,696
Deferred tax liabilities	2,295	2,162
Other	10,082	10,954
Total other non-current liabilities	$ 53,774	$ 80,191

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 0.6		$ 0.6		$ 0.6
Amortization expense	$ 4.6	$ 4.9	$ 15.1	$ 16.5

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets, Other than Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Intangible Assets Net Excluding Goodwill [Line Items]
Total intangible assets, Gross Carrying Amount	$ 226,627	$ 214,668
Amortized intangible assets, Gross Carrying Amount	194,344	182,385
Amortized intangible assets, Accumulated Amortization	(146,866)	(131,797)
Amortized intangible assets, Net Carrying Amount	47,478	50,588
Total intangible assets, Net Carrying Amount	79,761	82,871
FCC Licenses [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Total unamortized intangible assets, Gross Carrying Amount	32,283	32,283
Total unamortized intangible assets, Net Carrying Amount	$ 32,283	32,283
Software [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	2 years 8 months 12 days
Amortized intangible assets, Gross Carrying Amount	$ 176,539	164,580
Amortized intangible assets, Accumulated Amortization	(131,144)	(116,873)
Amortized intangible assets, Net Carrying Amount	45,395	47,707
OEM and Dealer Relationships [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Amortized intangible assets, Gross Carrying Amount	6,724	6,724
Amortized intangible assets, Accumulated Amortization	$ (6,724)	(6,724)
Service Customer Relationships [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	6 months
Amortized intangible assets, Gross Carrying Amount	$ 8,081	8,081
Amortized intangible assets, Accumulated Amortization	(7,566)	(6,804)
Amortized intangible assets, Net Carrying Amount	$ 515	1,277
Other Intangible Assets [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	7 years 9 months 18 days
Amortized intangible assets, Gross Carrying Amount	$ 3,000	3,000
Amortized intangible assets, Accumulated Amortization	(1,432)	(1,396)
Amortized intangible assets, Net Carrying Amount	$ 1,568	$ 1,604

Intangible Assets - Summary of

Intangible Assets - Summary of Amortization Expenses (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019 (period from October 1 to December 31)	$ 5,151
2020	18,394
2021	13,573
2022	8,068
2023	1,310
Thereafter	$ 982

Warranties - Additional Informa

Warranties - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Guarantor Obligations [Line Items]
Warranty reserve balance	$ 11,579	$ 12,291
Maximum [Member]
Guarantor Obligations [Line Items]
Warranty term	10 years
Minimum [Member]
Guarantor Obligations [Line Items]
Warranty term	2 years

Long-Term Debt and Other Liab_3

Long-Term Debt and Other Liabilities - Additional Information (Detail) $ / shares in Units, shares in Millions	May 07, 2019USD ($)	Apr. 25, 2019USD ($)	Apr. 18, 2019USD ($)	Jan. 03, 2017USD ($)	Jun. 14, 2016USD ($)	Mar. 03, 2015USD ($)$ / sharesshares	Aug. 26, 2019USD ($)ClassOfCommonStockTradingday	May 03, 2019USD ($)	Nov. 30, 2018USD ($)	Nov. 21, 2018USD ($)$ / shares	Sep. 25, 2017USD ($)	Mar. 31, 2015shares	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)Tradingdayshares	Sep. 30, 2018USD ($)shares	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of debt															$ 920,683,000
Total debt													$ 1,122,281,000		1,122,281,000		$ 1,041,948,000
Amortization of deferred financing costs													1,328,000	$ 1,060,000	3,901,000	$ 3,143,000
Additional paid-in-capital													975,462,000		$ 975,462,000		963,458,000
Forward stock repurchase transactions amount						$ 140,000,000
Forward stock repurchase transaction, shares | shares															7.2	7.2
Repayment of convertible notes															$ 159,502,000
Margin On LIBOR							London inter-bank offered rate plus an applicable margin ranging from 1.50% to 2.00%
Debt instrument maturity date description							The final maturity of the ABL Credit Facility is August 26, 2022, unless the aggregate outstanding principal amount of our 2022 Convertible Notes (as defined below) has not, on or prior to December 15, 2021, been repaid in full or refinanced with a new maturity date no earlier than February 26, 2023, in which case the final maturity date shall instead be December 16, 2021.
Letters of Credit [Member]
Debt Instrument [Line Items]
Restricted cash													8,000,000		8,000,000		7,000,000
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate On Debt							1.50%
Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate On Debt							0.50%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate On Debt							2.00%
Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate On Debt							1.00%
ABL Credit Facility [Member]
Debt Instrument [Line Items]
Effective interest rate on convertible notes							15.00%
Common stock price trading days | Tradingday							30
Line of Credit Facility, Current Borrowing Capacity													4,500,000		4,500,000
ABL Credit Facility [Member] | JP Morgan Chase Bank NA [Member]
Debt Instrument [Line Items]
Credit Facility borrowing base availability							$ 30,000,000
ABL Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unused Borrowing Fee Percentage							0.25%
Fixed Charge Coverage Ratio | ClassOfCommonStock							100
Minimum Fixed Charge Coverage Ratio | ClassOfCommonStock							100
ABL Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unused Borrowing Fee Percentage							0.375%
Fixed Charge Coverage Ratio | ClassOfCommonStock							110
Convertible Notes [Member]
Debt Instrument [Line Items]
Forward stock repurchase transaction, shares | shares						7.2
Forward stock repurchase transaction, settlement date						Mar. 1, 2020
12.500% Senior Secured Notes Due 2022 [Member]
Debt Instrument [Line Items]
Aggregate principal amount					$ 525,000,000
Interest rate					12.50%
Unamortized debt premium and consent fees													11,700,000		$ 11,700,000
Interest rate payable term															semi-annually
Loan origination fees															$ 15,900,000
Amortization of deferred financing costs														700,000	1,000,000	$ 2,000,000
Payment Of Premium On Debt Redemption															$ 51,400,000
12.500% Senior Secured Notes Due 2022 [Member] | Condition One [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage of principal amount redeemed															40.00%
Debt instrument redemption price, percentage															109.875%
Outstanding redemption percentage															50.00%
12.500% Senior Secured Notes Due 2022 [Member] | Additional Notes [Member] | January Two Thousand And Seventeen Additional Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount				$ 65,000,000
Interest rate				12.50%
Issue price as percentage of face value				108.00%
Proceeds from issuance of debt				$ 70,200,000
12.500% Senior Secured Notes Due 2022 [Member] | Additional Notes [Member] | September Two Thousand And Seventeen Additional Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount											$ 100,000,000
Interest rate											12.50%
Issue price as percentage of face value											113.00%
Proceeds from issuance of debt											$ 113,000,000
Accrued interest received											$ 2,900,000
12.500% Senior Secured Notes Due 2022 [Member] | Supplemental Indenture [Member]
Debt Instrument [Line Items]
Consent fees paid															$ 1,400,000
3.75% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount						$ 361,900,000
Interest rate						3.75%
Interest rate payable term						semi-annually
Amortization of deferred financing costs														$ 400,000	300,000	$ 1,100,000
Debt instrument redemption price, percentage						100.00%
Option granted to initial purchasers						$ 60,000,000
Additional paid-in-capital						100,000,000
Convertible Notes, carrying amount of liability component						261,900,000							$ 2,498,000		$ 2,498,000		149,195,000
Effective interest rate on convertible notes													11.50%		11.50%
Proceeds received from the issuance of the convertible notes						$ 361,900,000									$ 2,500,000		162,000,000
Convertible Notes, unamortized discount																	12,800,000
Conversion rate						41.9274
Principal amount						$ 1,000									1,000
Conversion price | $ / shares						$ 23.85
Multiples of principal amount						$ 1,000
Forward stock repurchase transactions amount						140,000,000
Forward stock repurchase transaction, shares | shares												7.2
Repayment of convertible notes									$ 199,900,000
Increase in convertale notes									$ 17,900,000
Debt Instrument Redemption Price			$ 1,000
Debt Instrument Principal Redemption			$ 1,000
Debt Issuance Costs, Net													$ 0		$ 0		900,000
3.75% Convertible Senior Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Percentage of common share price over conversion price for conversion															130.00%
3.75% Convertible Senior Notes [Member] | Issuance Costs [Member]
Debt Instrument [Line Items]
Loan origination fees															$ 10,400,000
Additional paid-in-capital													2,900,000		2,900,000
Issuance cost recorded to deferred financing costs													7,500,000		7,500,000
3.75% Convertible Senior Notes [Member] | Institutional Buyers [Member]
Debt Instrument [Line Items]
Aggregate principal amount						340,000,000
Principal amount of Convertible Notes, subsequently exercised						$ 21,900,000
2024 Senior Secured Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount													925,000,000		925,000,000
Total debt													921,000,000		921,000,000
Convertible Notes, unamortized discount													4,000,000		4,000,000
6.00% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 237,800,000
Interest rate										6.00%
Amortization of deferred financing costs															400,000
Debt issuance costs													4,900,000		4,900,000		1,200,000
Debt instrument redemption price, percentage										100.00%
Option granted to initial purchasers										$ 32,300,000
Principal amount of Convertible Notes, subsequently exercised										22,800,000
Additional paid-in-capital										49,100,000
Convertible Notes, carrying amount of liability component										$ 188,700,000			198,800,000		198,800,000		190,100,000
Effective interest rate on convertible notes										13.60%
Proceeds received from the issuance of the convertible notes										$ 237,800,000							237,800,000
Convertible Notes, unamortized discount													38,900,000		38,900,000		47,700,000
Conversion rate										166.6667
Principal amount										$ 1,000					1,000
Conversion price | $ / shares										$ 6
Multiples of principal amount										$ 1,000
Outstanding principal balance paid													237,800,000		$ 237,800,000
Debt Issuance Costs, Net																	$ 6,200,000
6.00% Convertible Senior Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Percentage of common share price over conversion price for conversion															130.00%
Common stock price trading days | Tradingday															20
Common stock price consecutive trading days | Tradingday															30
6.00% Convertible Senior Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument redemption price, percentage															98.00%
Common stock price trading days | Tradingday															5
Common stock price consecutive trading days | Tradingday															5
6.00% Convertible Senior Notes [Member] | Issuance Costs [Member]
Debt Instrument [Line Items]
Loan origination fees										8,100,000
Additional paid-in-capital										1,700,000
Issuance cost recorded to deferred financing costs										6,400,000
6.00% Convertible Senior Notes [Member] | Institutional Buyers [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 215,000,000
9.875% Senior secured Notes Due On 2024 [Member]
Debt Instrument [Line Items]
Aggregate principal amount		$ 905,000,000
Interest rate		9.875%
Increase Decrease In Debt Indebtedness								$ 20,000,000
Issue price as percentage of face value	99.512%
Maturity date		May 1, 2024
Loan origination fees															$ 22,600,000
Amortization of deferred financing costs													900,000		1,500,000
Debt issuance costs													21,200,000		$ 21,200,000
9.875% Senior secured Notes Due On 2024 [Member] | May Two Thousand And Nineteen Additional Notes [Member]
Debt Instrument [Line Items]
Interest rate	9.875%
Issue price as percentage of face value	100.50%
Proceeds from issuance of debt	$ 920,700,000
Accrued interest received	$ 100,000
Debt Instrument, Interest Rate Terms		semiannually
9.875% Senior secured Notes Due On 2024 [Member] | Condition One [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage of principal amount redeemed															103.00%
Debt Instrument Redemption Price Aggregate Of Principal Amount Redeemable													150,000,000		$ 150,000,000
9.875% Senior secured Notes Due On 2024 [Member] | Condition Two [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage of principal amount redeemed															101.00%
Debt instrument redemption price, percentage					100.00%
Two Thousand Twenty Convertible Notes [Member]
Debt Instrument [Line Items]
Repayment of convertible notes															$ 500,000
Two Thousand Twenty Convertible Notes [Member] | loss on extinguishment of debt [Member]
Debt Instrument [Line Items]
Repayment of convertible notes													159,000,000		159,000,000
Debt Issuance Costs, Net													600,000		600,000
Repayments Of Convertible Debt Adjustments													$ 8,500,000		$ 8,500,000

Long-Term Debt and Other Liab_4

Long-Term Debt and Other Liabilities - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Mar. 03, 2015
Debt Instrument [Line Items]
Total debt	$ 1,122,281	$ 1,041,948
Less deferred financing costs	(26,115)	(17,055)
Total long-term debt	1,096,166	1,024,893
2024 Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior Secured Notes	920,965
Total debt	920,965
2022 Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior Secured Notes		702,670
2022 Convertible Notes [Member]
Debt Instrument [Line Items]
Convertible Notes	198,818	190,083
2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Convertible Notes	$ 2,498	$ 149,195	$ 261,900

Long-Term Debt and Other Liab_5

Long-Term Debt and Other Liabilities - Summary of Redemption Prices Plus Accrued and Unpaid Interest (Detail) - 2024 Senior Secured Notes [Member]	9 Months Ended
	Sep. 30, 2019
2019 [Member]
Debt Instrument, Redemption [Line Items]
Debt instrument redemption price, percentage	104.938%
2020 [Member]
Debt Instrument, Redemption [Line Items]
Debt instrument redemption price, percentage	102.469%
2021 and Thereafter [Member]
Debt Instrument, Redemption [Line Items]
Debt instrument redemption price, percentage	100.00%

Interest Costs - Summary of Int

Interest Costs - Summary of Interest Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule Of Interest [Line Items]
Interest costs charged to expense	$ 26,296	$ 24,887	$ 84,053	$ 74,795
Amortization of deferred financing costs	1,328	1,060	3,901	3,143
Accretion of debt discount	3,116	5,517	12,508	16,109
Amortization of debt premium		(721)	(1,018)	(2,109)
Interest expense	30,740	30,743	99,444	91,938
Total interest costs	30,928	30,851	99,883	92,168
Property and Equipment [Member]
Schedule Of Interest [Line Items]
Interest costs capitalized		7	11	22
Software [Member]
Schedule Of Interest [Line Items]
Interest costs capitalized	$ 188	$ 101	$ 428	$ 208

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Leases [Line Items]
Amortization of deferred airborne lease incentives	$ 6,335	$ 8,074	$ 21,365	$ 23,166
Deferred airborne lease incentives included in current liabilities	24,954		24,954		$ 24,145
Deferred airborne lease incentives included in non-current liabilities	133,328		133,328		$ 129,086
Revenue share expense, net of amortization of deferred airborne lease incentives	$ 5,000	$ 5,500	$ 15,600	$ 18,600
Lessee operating lease option to extend			20 years

Leases - summary of our lease e

Leases - summary of our lease expense (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Operating lease cost	$ 4,878	$ 14,990
Finance lease cost
Amortization of leased assets	172	548
Interest on lease liabilities	8	35
Total lease cost	$ 5,058	$ 15,573

Leases - Other information rega

Leases - Other information regarding our leases (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows used in operating leases	$ 5,842	$ 17,750
Operating cash flows used in financing leases	8	35
Financing cash flows used in financing leases	169	552
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 2,584	$ 3,631
Weighted average remaining lease term
Operating leases	8 years	8 years
Financing leases	1 year	1 year
Weighted average discount rate
Operating leases	10.30%	10.30%
Financing leases	8.10%	8.10%

Leases - Annual Future Minimum

Leases - Annual Future Minimum Obligations for Operating Leases Other than Arrangements with Commercial Airline Partners (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leases
2019 (period from July 1 to December 31)	$ 5,733	$ 21,902
2020	22,030	19,867
2021	21,763	19,742
2022	20,109	18,420
2023	16,246	14,826
Thereafter	76,910	$ 78,100
Total future minimum lease payments	162,791
Less: Amount representing interest	(54,666)
Present value of net minimum lease payments	108,125
Accrued liabilities	11,917
Non-current operating lease liabilities	96,208
Total lease liabilities	108,125
Financing Leases
2019 (period from July 1 to December 31)	119
2020	197
Total future minimum lease payments	316
Less: Amount representing interest	(15)
Present value of net minimum lease payments	301
Accrued liabilities	295
Other non-current liabilities	6
Total lease liabilities	$ 301

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Loss Contingencies [Line Items]
2019 (July 1 through December 31)	$ 34.2
2020	135.1
2021	121.3
2022	99.7
2023	78.3
Thereafter	$ 217.5
Linksmart Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	April 20, 2018
Securities Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	June 27, 2018
Derivative Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	September 25, 2018 and September 26, 2018

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets fair value adjustments	$ 0	$ 0	$ 0	$ 0

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Summary of Fair Value and Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Mar. 03, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	$ 1,122,281	$ 1,041,948
2024 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Long Term Debt	999,000
Total debt	920,965
2022 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Long Term Debt		737,000
Total debt		702,670
2022 Convertible Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Convertible Notes	284,000	216,000
Carrying Value of Convertible Notes	198,818	190,083
2020 Convertible Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Convertible Notes	2,498	150,000
Carrying Value of Convertible Notes	$ 2,498	$ 149,195	$ 261,900

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities - Summary of Fair Value and Carrying Value of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
2024 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt premium and consent fees	$ 4
2022 Senior Secured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt premium and consent fees		$ 12.7
6% Convertible Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Unamortized Discount	$ 38.9	47.7
3.75% Convertible Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Unamortized Discount		$ 12.8

Income Tax - Additional Informa

Income Tax - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Effective income tax rate	(0.90%)	(0.50%)	(0.60%)	3.30%
Reduction in our valuation allowance due to tax reform				$ 4
Interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0	$ 0
Liabilities for interest and potential penalties	$ 0		0		$ 0
Increase (decrease) in unrecognized tax benefits			$ 0

Business Segments and Major C_3

Business Segments and Major Customers - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)Segment	Sep. 30, 2018USD ($)Customer	Dec. 31, 2018
Segment Reporting Information [Line Items]
Number of operating segments | Segment			3
Equipment revenue	$ 201,182	$ 217,257	$ 614,416	$ 676,540
American Airlines [Member] | Transition Agreement To Airline Directed Model [Member]
Segment Reporting Information [Line Items]
Equipment revenue			$ 45,400
Revenue [Member]
Segment Reporting Information [Line Items]
Number of customers meeting concentration risk threshold | Customer				0
Revenue [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark	15.00%		15.00%
Revenue [Member] | Customer Concentration Risk [Member] | Delta Airline and American Airlines [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark	28.00%	25.00%	28.00%	23.00%
Revenue [Member] | Customer Concentration Risk [Member] | American Airlines [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark	10.00%		10.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | American Airlines [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark	18.00%		25.00%		11.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Delta Air Lines [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark			10.00%		11.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Other Airlines [Member]
Segment Reporting Information [Line Items]
Percentage of benchmark			10.00%

Business Segments and Major C_4

Business Segments and Major Customers - Summary of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 201,182	$ 217,257	$ 614,416	$ 676,540
Segment profit (loss)	35,500	21,130	111,587	51,750
Service [Member]
Segment Reporting Information [Line Items]
Total revenue	158,399	160,376	497,142	470,110
Product [Member]
Segment Reporting Information [Line Items]
Total revenue	42,783	56,881	117,274	206,430
CA-NA [Member]
Segment Reporting Information [Line Items]
Total revenue	84,135	108,470	285,931	371,941
Segment profit (loss)	12,208	8,699	59,921	17,396
CA-NA [Member] | Service [Member]
Segment Reporting Information [Line Items]
Total revenue	80,470	93,443	268,899	277,972
CA-NA [Member] | Product [Member]
Segment Reporting Information [Line Items]
Total revenue	3,665	15,027	17,032	93,969
CA-ROW [Member]
Segment Reporting Information [Line Items]
Total revenue	35,707	35,197	105,355	88,011
Segment profit (loss)	(13,659)	(22,747)	(50,073)	(69,826)
CA-ROW [Member] | Service [Member]
Segment Reporting Information [Line Items]
Total revenue	22,580	17,646	64,925	47,076
CA-ROW [Member] | Product [Member]
Segment Reporting Information [Line Items]
Total revenue	13,127	17,551	40,430	40,935
BA [Member]
Segment Reporting Information [Line Items]
Total revenue	81,340	73,590	223,130	216,588
Segment profit (loss)	36,951	35,178	101,739	104,180
BA [Member] | Service [Member]
Segment Reporting Information [Line Items]
Total revenue	55,349	49,287	163,318	145,062
BA [Member] | Product [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 25,991	$ 24,303	$ 59,812	$ 71,526

Business Segments and Major C_5

Business Segments and Major Customers - Reconciliation of Segment Profit (loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	$ 35,500	$ 21,130	$ 111,587	$ 51,750
Interest income	987	903	3,366	3,307
Interest expense	(30,740)	(30,743)	(99,444)	(91,938)
Depreciation and amortization	(29,292)	(32,590)	(90,008)	(100,447)
Transition to airline-directed model				21,551
Amortization of deferred airborne lease incentives	6,335	8,074	21,365	23,166
Amortization of STC costs	(1,259)	(292)	(1,901)	(719)
Stock-based compensation expense	(4,066)	(3,932)	(12,711)	(12,531)
Loss on extinguishment of debt			(57,962)
Other income (expense)	(143)	(72)	2,779	59
Loss before income taxes	(22,678)	(37,522)	(122,929)	(105,802)
CA-NA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	12,208	8,699	59,921	17,396
CA-ROW [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	(13,659)	(22,747)	(50,073)	(69,826)
BA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	$ 36,951	$ 35,178	$ 101,739	$ 104,180

Employee Retirement and Postr_3

Employee Retirement and Postretirement Benefits - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Employee Contribution			100.00%
Percentage of employees contribution matched by the company			4.00%
Employer Contribution	$ 1.2	$ 1.2	$ 3.8	$ 3.8
Stock options, shares granted			1,455,455
Stock options exercised			478,147
Stock options, shares expired			561,582
Market Condition [Member]
Stock options, shares granted			148,500
Stock options exercised			230,221
Share units granted			86,000
Share units forfeited			64,445
Restricted Stock Units (RSUs) [Member]
Share units granted			2,000,338
Share units forfeited			447,503
Share units vested			466,886
Restricted Stock [Member]
Share units vested			66,174
Deferred Stock Units [Member]
Share units granted			161,833
Share units vested			161,833
Employee Stock Purchase Plan [Member]
Common stock, shares issued under ESPP			238,127

Employee Retirement and Postr_4

Employee Retirement and Postretirement Benefits - Summary of Stock-Based Compensation Expense by Operating Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 4,066	$ 3,932	$ 12,711	$ 12,531
Cost of Service Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	394	303	1,196	1,184
Cost of Equipment Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	60	33	211	146
Engineering, Design and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	717	812	2,271	2,505
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	849	901	2,786	3,209
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 2,046	$ 1,883	$ 6,247	$ 5,487

Research and Development Costs

Research and Development Costs - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Research and Development Expense	$ 21.2	$ 19.2	$ 52.9	$ 56.3