Subsequent Events Narrative (Details) - USD ($)		3 Months Ended
	Apr. 18, 2019	Mar. 31, 2019	Mar. 31, 2018	Apr. 17, 2019
Subsequent Event [Line Items]
Cash paid, net of cash acquired		$ 2,999,000	$ 34,320,000
Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Long-term line of credit, net of cash on hand	$ 307,000,000
Interest rate	6.50%
Line of Credit | Credit Facility
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 400,000,000
Line of Credit | Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Proceeds from secured debt	$ 30,000,000
Proceeds from issuance of revolver debt	10,000,000
Maximum borrowing capacity	321,400,000.0			$ 281,400,000.0
PostUp Holdings And PostUp Digiital | Subsequent Event
Subsequent Event [Line Items]
Cash paid, net of cash acquired	$ 35,000,000
LIBOR | Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Basis points, percentage	4.00%