Condensed Consolidated Statements of Shareholders' Equity (Parentheticals) - USD ($)	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Shareholders Equity Parentheticals
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 7,082,143,000	$ 6,957,403,000
Unfunded pension obligation [Member]
Shareholders Equity Parentheticals
Balance at end of period, unfunded pension obligation, tax impact	8,670,000	5,034,000
Unrealized gain on investments [Member]
Shareholders Equity Parentheticals
Balance at end of period, unrealized gain on investments, tax impact	$ 0	$ 0

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4I

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4590271-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568740-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568447-111683

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