EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	2 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2015	Jan. 31, 2015	Mar. 31, 2014
Calculation of basic earnings per share:
Net income	$ 62,861
Calculation of diluted earnings per share:
Net income	62,861
Predecessor
Calculation of basic earnings per share:
Net income		1,509	83,639
Average shares issued and outstanding		79,343,253	78,627,003
Issuable under various deferred compensation plans (in shares)		1,109,595	981,458
Weighted shares outstanding - basic		80,452,848	79,608,461
Per share:
Net income available to PLC's common shareowners - basic (in dollars per share)		$ 0.02	$ 1.05
Calculation of diluted earnings per share:
Net income		$ 1,509	$ 83,639
Weighted shares outstanding - basic		80,452,848	79,608,461
Stock appreciation rights ("SARs") (in shares)		64,570	466,251
Issuable under various other stock-based compensation plans (in shares)		935,382	565,664
Restricted stock units (in shares)		306,487	231,776
Weighted shares outstanding - diluted		81,759,287	80,872,152
Per share:
Net income available to PLC's common shareowners - diluted (in dollars per share)		$ 0.02	$ 1.03