CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Income tax provision on unrealized gain on investment in equity securities	$ 0	$ 0	$ 0	$ 200

Other Comprehensive Income (Loss), Reclassification of Gain on Investment in Equity Securities, Net of Tax, to Retained Earnings from the Effect of an Accounting Change, Tax

No definition available.

Name:	asps_OtherComprehensiveIncomeLossReclassificationofGainonInvestmentinEquitySecuritiesNetofTaxtoRetainedEarningsfromtheEffectofanAccountingChangeTax
Namespace Prefix:	asps_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration