Schedule II-Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 88,757	$ 59,805	$ 55,502
Charged to Costs and Expenses	1,854	17,855	3,270
Charged to Other Accounts	(1,902)	21,450	7,257
Deemed Uncollectible	0	(10,353)	(6,224)
Collected/ Recovered	0	0	0
Balance at End of Year	88,709	88,757	59,805
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	76,225	58,241	50,699
Charged to Other Accounts	(1,386)	17,984	7,542
Collected/ Recovered	0	0	0
Balance at End of Year	74,839	76,225	58,241
Allowance for loan losses
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	0	1,564	4,803
Charged to Costs and Expenses		9,319	3,270
Charged to Other Accounts		(530)	(285)
Deemed Uncollectible		(10,353)	(6,224)
Collected/ Recovered		0	0
Balance at End of Year		0	1,564
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	12,532	0
Charged to Costs and Expenses	1,854	8,536
Charged to Other Accounts	(516)	3,996
Collected/ Recovered	0	0
Balance at End of Year	$ 13,870	$ 12,532	$ 0