CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets Abstract
Cash	$ 68,266	$ 122,893	$ 34,167
Restricted Cash	0	69,365
Accounts receivable, net of allowance for doubtful accounts	269,945	342,766
Prepaid expenses, deposits and other	33,840	25,205
Total current assets	372,051	560,229
Investments	11,205	11,205
Net property and equipment	327,901	317,030
Operating Lease ROU Asset	293,638	0
Radio broadcasting licenses	2,499,490	2,516,625
Goodwill	534,607	539,469
Assets held for sale	22,795	19,603
Deferred charges and other assets, net of accumulated amortization	38,517	56,197
TOTAL ASSETS	4,100,204	4,020,358
Liabilities Abstract
Accounts payable	2,826	1,858
Accrued expenses	46,890	58,449
Accrued compensation and other current liabilities	114,491	118,438
Operating Lease Liability Current	37,434	0
Long-term debt, current portion	0	0
Total current liabilities	201,641	178,745
Long-term debt, net of current portion	1,692,258	1,872,203
Operating Lease Liability Noncurrent	275,739	0
Deferred tax liabilities	546,971	545,982
Other long-term liabilities	52,097	89,168
Total long-term liabilities	2,567,065	2,507,353
Total liabilities	2,768,706	2,686,098
CONTINGENCIES AND COMMITMENTS
Perpetual Cumulative Convertible Preferred Stock	0	0
SHAREHOLDERS' EQUITY:
Preferred stock	0	0
Common stock	1,427	1,412
Additional paid-in capital	1,682,891	1,693,512
Accumulated deficit	(352,820)	(360,664)
Total shareholders' equity	1,331,498	1,334,260	$ 1,764,360
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,100,204	4,020,358
Common Class A [Member]
SHAREHOLDERS' EQUITY:
Common stock	1,387	1,372
Common Class B [Member]
SHAREHOLDERS' EQUITY:
Common stock	40	40
Common Class C Member
SHAREHOLDERS' EQUITY:
Common stock	$ 0	$ 0

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.