SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of advertising costs expensed

Years ended December 31,	2017		2016		2015
(in thousands)
Advertising	$	66,115	$	61,258	$	57,705

Schedule of cash and cash equivalents

At December 31,	2017		2016
(in thousands) (in US dollars)
Cash held in foreign bank accounts	$	57,790	$	54,424

Schedule of depreciation

Years ended December 31,	2017		2016		2015
(in thousands)
Depreciation	$	27,381	$	24,725	$	19,354

Reconciliation of weighted average shares outstanding along with the earnings per share attributable to restricted shares of common stock (participating securities)

A reconciliation of weighted average shares outstanding along with the earnings per share attributable to restricted shares of common stock (participating securities) is as follows (in thousands except per share data). All share and per share information in the following chart are restated for the stock split effective March 10, 2015:

Years Ended December 31,	2017			2016			2015
Net income available to stockholders	$	179,124		$	167,369		$	152,149
Less:  Dividends paid
Common Stock	(120,930		)	(107,880		)	(90,631		)
Restricted shares of common stock	(1,087		)	(1,122		)	(1,124		)
Undistributed earnings for the period	$	57,107		$	58,367		$	60,394
Allocation of undistributed earnings:
Common stock	$	56,567		$	57,722		$	59,611
Restricted shares of common stock	540			645			783
Basic and diluted shares outstanding:
Common stock	215,927			215,831			215,749
Restricted shares of common stock	2,061			2,413			2,834
	217,988			218,244			218,583
Basic and diluted earnings per share:
Common stock:
Distributed earnings	$	0.56		$	0.50		$	0.42
Undistributed earnings	0.26			0.27			0.28
	$	0.82		$	0.77		$	0.70
Restricted shares of common stock
Distributed earnings	$	0.53		$	0.46		$	0.40
Undistributed earnings	0.26			0.27			0.28
	$	0.79		$	0.73		$	0.68