Fair Value Measurements - Reconciliation of Assets and Liabilities Measured Using Significant Unboservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value adjustment	$ 135	$ 130
Cash payments	(50)
Full House Mortgage Connection, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance at March 31, 2018	6,700
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 January 1, 2018	6,580
Balance at March 31, 2018	6,665
Full House Mortgage Connection, Inc. | Level 3 | Measured on a recurring basis | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance at January 1, 2018	6,580
Fair value adjustment	135
Cash payments	(50)
Balance at March 31, 2018	$ 6,665