Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 10,826	$ 13,045	$ 19,511
Charged to Costs & Expenses		1,736	3,228	5,782
Charged to Other Accounts		0	0	0
Deductions	[1]	(6,350)	(5,447)	(12,248)
Balance at End of Period		6,212	10,826	13,045
Claim Losses [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		24,871	26,128	26,106
Charged to Costs & Expenses		10,448	11,138	13,998
Charged to Other Accounts		0	0	0
Deductions	[2]	(9,975)	(12,395)	(13,976)
Balance at End of Period		25,344	24,871	26,128
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		21,911	24,173	30,955
Charged to Costs & Expenses		(2,645)	(5,506)	(5,295)
Charged to Other Accounts	[3]	(95)	3,244	(1,487)
Deductions		0	0	0
Balance at End of Period		$ 19,171	$ 21,911	$ 24,173

[1] Amount represents accounts written off, net of recoveries.

[2] Amount represents claim payments, net of recoveries.

[3] Amount represents adjustments for acquired net operating loss and credit carryforwards.