Receivables - Estimated Accretable Yield (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning of period	$ 839
Change in accretable yield due to change in timing of estimated cash flows	(30)
Interest income recognized	(869)
End of period	$ 0