Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 19,093		$ 14,402		$ 10,855
Charged to Costs & Expenses	6,384		11,002		4,264
Charged to Other Accounts	0		0		0
Deductions	12,547	[1]	6,311	[1]	717	[1]
Balance at End of Period	12,930		19,093		14,402
Claim Losses [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	25,410		21,806		22,882
Charged to Costs & Expenses	14,405		18,729		16,960
Charged to Other Accounts	0		0		0
Deductions	13,809	[2]	15,125	[2]	18,036	[2]
Balance at End of Period	26,006		25,410		21,806
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	30,955		29,389		19,058
Charged to Costs & Expenses	(5,295)		13,134		0
Charged to Other Accounts	(1,487)	[3]	(11,568)	[3]	12,156
Deductions	0		0		1,825
Balance at End of Period	$ 24,173		$ 30,955		$ 29,389

[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.