Contingently redeemable preference shares (Tables)

6 Months Ended

Jun. 30, 2020

Preferred Shares [Abstract]

Reconciliation of beginning and ending balances of preference shares

The following table presents a reconciliation of the preference shares for the six months ended June 30, 2020 and 2019:

	Six Months Ended June 30,
	2020		2019
	($ in thousands)
Preference shares:
Balance at the beginning of the period	$	52,305	$	220,992
Accretion discount and issuance costs on remaining preference shares	46		183
Balance at the end of the period	$	52,351	$	221,175