Fair Value Measurements Carrying Value (Details) (Carrying Value [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Parent Company [Member]
Assets:
Cash and Cash Equivalents	$ 84,707	$ 44,302
Restricted Cash	54,964	7,171
Notes Receivable and Other	52,692	53,449
Total assets	192,363	104,922
Liabilities:
Short-term Debt	0	162,000
Total liabilities	0	162,000
Parent Company [Member] | Level 1 [Member]
Assets:
Cash and Cash Equivalents	84,707	44,302
Restricted Cash	54,964	7,171
Notes Receivable and Other	0	0
Total assets	139,671	51,473
Liabilities:
Short-term Debt	0	162,000
Total liabilities	0	162,000
Parent Company [Member] | Level 2 [Member]
Assets:
Cash and Cash Equivalents	0	0
Restricted Cash	0	0
Notes Receivable and Other	52,692	53,449
Total assets	52,692	53,449
Liabilities:
Short-term Debt	0	0
Total liabilities	0	0
Subsidiaries [Member]
Assets:
Cash and Cash Equivalents	69,160	44,111
Restricted Cash	54,964	7,171
Notes Receivable and Other	52,692	53,449
Total assets	176,816	104,731
Liabilities:
Short-term Debt	0	162,000
Short-term Debt owed by PSE to PE	28,933	29,598
Total liabilities	28,933	191,598
Subsidiaries [Member] | Level 1 [Member]
Assets:
Cash and Cash Equivalents	69,160	44,111
Restricted Cash	54,964	7,171
Notes Receivable and Other	0	0
Total assets	124,124	51,282
Liabilities:
Short-term Debt	0	162,000
Short-term Debt owed by PSE to PE	0	0
Total liabilities	0	162,000
Subsidiaries [Member] | Level 2 [Member]
Assets:
Cash and Cash Equivalents	0	0
Restricted Cash	0	0
Notes Receivable and Other	52,692	53,449
Total assets	52,692	53,449
Liabilities:
Short-term Debt	0	0
Short-term Debt owed by PSE to PE	28,933	29,598
Total liabilities	$ 28,933	$ 29,598