Segment Reporting - Depreciation and Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Depreciation	$ 8,798	$ 7,026
Amortization expense	980	1,008
Operating Segments
Segment Reporting Information [Line Items]
Depreciation	1,155	1,048
Amortization expense	0	0
Operating Segments | Mobile Connectivity
Segment Reporting Information [Line Items]
Depreciation	7,084	5,440
Amortization expense	980	1,008
Unallocated, net
Segment Reporting Information [Line Items]
Depreciation	559	538
Amortization expense	$ 0	$ 0