Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill and Intangible Assets, Net

Intangible assets, net are summarized as follows:

	December 31,
($ in thousands)	2018			2017
Definite-lived intangible assets, net:
Investment contracts and other	$	487,747		$	425,747
Accumulated amortization	(192,451		)	(167,309		)
Definite-lived intangible assets, net	295,296			258,438
Indefinite-lived intangible assets	43,516			43,516
Total intangible assets, net	$	338,812		$	301,954

Activity in goodwill and intangible assets, net is as follows:

	Years Ended December 31,
($ in thousands)	2018			2017			2016
Intangible assets, net
Balance, beginning of period	$	301,954		$	38,427		$	40,887
Acquisitions (1)	62,000			275,700			—
Amortization expense	(25,142		)	(12,173		)	(2,460		)
Balance, end of period	$	338,812		$	301,954		$	38,427
Goodwill
Balance, beginning of period	$	170,153		$	6,788		$	6,701
Acquisitions (1)	120,213			163,365			—
Acquisition related adjustments	—			—			87
Balance, end of period	$	290,366		$	170,153		$	6,788

(1) - See Note 4 for details on the acquired goodwill and intangible assets.

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Definite-lived intangible asset amortization for the next five years and thereafter is estimated as follows ($ in thousands):

Fiscal Year	Amount
2019	$	30,110
2020	29,945
2021	29,933
2022	29,809
2023	29,148
2024 and Thereafter	146,351
	$	295,296