Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

The following table shows an analysis of goodwill and other intangible assets:

	Goodwill and other intangible assets
	Goodwill			Other intangible assets			Total
Balance as of December 31, 2015
Gross amount	$	199,889		$	96,599		$	296,488
Accumulated impairment losses and amortization	(2,299		)	(29,035		)	(31,334		)
	197,590			67,564			265,154
Amortization	—			(13,968		)	(13,968		)
Balance as of December 31, 2016
Gross amount	199,889			96,599			296,488
Accumulated impairment losses and amortization	(2,299		)	(43,003		)	(45,302		)
	197,590			53,596			251,186
Amortization	—			(8,041		)	(8,041		)
Balance as of December 31, 2017
Gross amount	199,889			96,599			296,488
Accumulated impairment losses and amortization	(2,299		)	(51,044		)	(53,343		)
	$	197,590		$	45,555		$	243,145

Schedule of Goodwill and Other Intangible Assets Included In Equity Method Investments

The following table shows an analysis of goodwill and other intangible assets included in investments in other ventures, under equity method:

	Goodwill and other intangible assets included in investments in other  ventures, under equity method
	Goodwill			Other intangible  assets			Total
Balance as of December 31, 2015
Gross amount	$	12,318		$	51,796		$	64,114
Accumulated impairment losses and amortization	(4,500		)	(36,460		)	(40,960		)
	7,818			15,336			23,154
Amortization	—			(3,474		)	(3,474		)
Balance as of December 31, 2016
Gross amount	12,318			51,796			64,114
Accumulated impairment losses and amortization	(4,500		)	(39,934		)	(44,434		)
	7,818			11,862			19,680
Amortization	—			(2,946		)	(2,946		)
Balance as of December 31, 2017
Gross amount	12,318			51,796			64,114
Accumulated impairment losses and amortization	(4,500		)	(42,880		)	(47,380		)
	$	7,818		$	8,916		$	16,734

Schedule of Other Intangible Assets By Major Class

The gross carrying value and accumulated amortization by major category of other intangible assets is shown below:

	Other intangible assets
At December 31, 2017	Gross  carrying   value		Accumulated amortization and impairment losses			Total
Customer relationships and customer lists	$	95,458	$	(51,633	)	$	43,825
Value of business acquired	20,200		(20,200		)	—
Software	12,230		(12,230		)	—
Licenses	10,267		—			10,267
Patents and intellectual property	4,500		(4,500		)	—
Covenants not-to-compete	4,030		(4,030		)	—
Trademarks and trade names	1,710		(1,331		)	379
	$	148,395	$	(93,924	)	$	54,471

	Other intangible assets
At December 31, 2016	Gross  carrying   value		Accumulated amortization and impairment losses			Total
Customer relationships and customer lists	$	95,458	$	(42,142	)	$	53,316
Value of business acquired	20,200		(19,527		)	673
Software	12,230		(11,938		)	292
Licenses	10,267		—			10,267
Patents and intellectual property	4,500		(4,500		)	—
Covenants not-to-compete	4,030		(3,523		)	507
Trademarks and trade names	1,710		(1,307		)	403
	$	148,395	$	(82,937	)	$	65,458

Schedule of Expected Amortization Expense

Expected amortization of the other intangible assets, including other intangible assets recorded in investments in other ventures, under equity method, is shown below:

	Other intangibles		Other intangible assets  included in investments in other ventures, under equity method		Total
2018	$	5,727	$	2,596	$	8,323
2019	5,446		2,427		7,873
2020	5,237		1,564		6,801
2021	4,910		702		5,612
2022	4,522		702		5,224
2023 and thereafter	9,446		925		10,371
Total remaining amortization expense	35,288		8,916		44,204
Indefinite lived	10,267		—		10,267
Total	$	45,555	$	8,916	$	54,471