Fair Value Measurements - Reconciliation of Assets and Liabilities Measured Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value adjustment	$ (940)	$ 420	$ (860)	$ 250
Cash payments			(50)
Full House Mortgage Connection, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance at Ending	5,700		5,700
Full House Mortgage Connection, Inc. | Measured on a recurring basis | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance at Beginning			6,580
Balance at Ending	5,670		5,670
Full House Mortgage Connection, Inc. | Measured on a recurring basis | Contingent consideration | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance at Beginning			6,580
Fair value adjustment			(860)
Cash payments			(50)
Balance at Ending	$ 5,670		$ 5,670