Geographic Segments (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting

	Year ended December 31,
	2016			2015			2014
	(In thousands)
Revenues:
Western Hemisphere
Products	$	254,359		$	332,452		$	430,597
Services	63,350			88,376			74,544
Intercompany	43,856			53,429			55,094
Total	$	361,565		$	474,257		$	560,235
Eastern Hemisphere
Products	$	106,862		$	234,853		$	205,185
Services	34,818			52,963			59,794
Intercompany	337			5,799			10,719
Total	$	142,017		$	293,615		$	275,698
Asia-Pacific
Products	$	71,791		$	118,059		$	137,423
Services	7,551			17,607			23,414
Intercompany	1,882			5,124			3,165
Total	$	81,224		$	140,790		$	164,002
Summary
Products	$	433,012		$	685,364		$	773,205
Services	105,719			158,946			157,752
Intercompany	46,075			64,352			68,978
Eliminations	(46,075		)	(64,352		)	(68,978		)
Total	$	538,731		$	844,310		$	930,957
Depreciation and amortization:
Western Hemisphere	22,455			20,301			20,851
Eastern Hemisphere	4,965			5,685			5,794
Asia-Pacific	4,437			4,491			4,510
Total	$	31,857		$	30,477		$	31,155
Income before income taxes:
Western Hemisphere	$	40,280		$	112,499		$	143,206
Eastern Hemisphere	60,835			89,349			79,146
Asia-Pacific	12,779			38,155			54,302
Eliminations	1,974			9,768			2,726
Total	$	115,868		$	249,771		$	279,380
Total Long-Lived Assets:
Western Hemisphere	$	317,875		$	208,408		$	221,597
Eastern Hemisphere	33,338			43,449			45,517
Asia-Pacific	53,960			55,021			57,823
Eliminations	(480		)	(2,926		)	(2,926		)
Total	$	404,693		$	303,952		$	322,011
Total Assets:
Western Hemisphere	$	775,358		$	677,460		$	731,448
Eastern Hemisphere	318,529			391,672			375,781
Asia-Pacific	370,043			372,823			354,329
Eliminations	(2,526		)	(13,705		)	(12,307		)
Total	$	1,461,404		$	1,428,250		$	1,449,251