Summary of Significant Accounting Policies Consolidated Balance Adoption of the New Leasing Standard (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
ASSETS
Other current assets	$ 124,982	$ 107,228	$ 108,220
Total current assets	679,639	653,180	654,172
Operating lease right-of-use asset	80,607	83,707	0
Total long-term assets	1,152,836	966,884	883,177
TOTAL ASSETS	1,832,475	1,620,064	1,537,349
LIABILITIES
Accrued liabilities	322,938	274,459	260,683
Total current liabilities	725,337	784,220	770,444
Long-term operating lease liability	67,472	68,939	0
Total long-term liabilities	929,313	845,077	776,138
TOTAL LIABILITIES	1,654,650	1,629,297	$ 1,546,582
Accounting Standards Update 2016-02
ASSETS
Other current assets	$ 1,000	(992)
Total current assets		(992)
Operating lease right-of-use asset		83,707
Total long-term assets		83,707
TOTAL ASSETS		82,715
LIABILITIES
Accrued liabilities		13,776
Total current liabilities		13,776
Long-term operating lease liability		68,939
Total long-term liabilities		68,939
TOTAL LIABILITIES		$ 82,715