11. Derivative Financial Instruments (Details) - Hedging Relationship (USD $)	3 Months Ended		9 Months Ended		3 Months Ended								9 Months Ended		3 Months Ended						9 Months Ended		3 Months Ended								9 Months Ended		3 Months Ended														9 Months Ended		3 Months Ended						9 Months Ended		3 Months Ended								9 Months Ended		3 Months Ended								9 Months Ended		3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Cash Flow Hedging [Member]	Jun. 30, 2013 Cash Flow Hedging [Member]	Mar. 31, 2013 Cash Flow Hedging [Member]	Sep. 30, 2012 Cash Flow Hedging [Member]	Jun. 30, 2012 Cash Flow Hedging [Member]	Mar. 31, 2012 Cash Flow Hedging [Member]	Sep. 30, 2013 Net Sales [Member]	Sep. 30, 2012 Net Sales [Member]	Sep. 30, 2013 Net Sales [Member]	Sep. 30, 2012 Net Sales [Member]	Mar. 31, 2013 Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Net Sales [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Net Sales [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Currency Gain (Loss) [Member]	Sep. 30, 2012 Foreign Currency Gain (Loss) [Member]	Sep. 30, 2013 Foreign Currency Gain (Loss) [Member]	Sep. 30, 2012 Foreign Currency Gain (Loss) [Member]	Sep. 30, 2013 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Interest Expense [Member]	Sep. 30, 2012 Interest Expense [Member]	Sep. 30, 2013 Interest Expense [Member]	Sep. 30, 2012 Interest Expense [Member]	Sep. 30, 2013 Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Other Income (Expense) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Other Income (Expense) [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Other Income (Expense) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Other Income (Expense) [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Foreign Exchange Forward [Member] Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Net Sales [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Net Sales [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Foreign Exchange Forward [Member] Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Net Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Net Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Net Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Net Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Foreign Currency Gain (Loss) [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Foreign Exchange Forward [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Cost of Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Cost of Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Foreign Exchange Forward [Member] Cost of Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Cost of Sales [Member] Not Designated as Hedging Instrument [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Interest Rate Swap [Member] Net Sales [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Interest Rate Swap [Member] Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Interest Rate Swap [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Interest Rate Swap [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Cross Currency Interest Rate Contract [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Cross Currency Interest Rate Contract [Member] Net Sales [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Cross Currency Interest Rate Contract [Member] Net Sales [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Cross Currency Interest Rate Contract [Member] Foreign Currency Gain (Loss) [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2013 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Sep. 30, 2012 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]	Mar. 31, 2012 Cross Currency Interest Rate Contract [Member] Interest Expense [Member] Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]
Balance at beginning of period					$ (5,831,000)	$ (8,734,000)	$ (518,000)	$ 9,689,000	$ 5,975,000	$ 25,281,000																													$ 0	$ 0	$ 8,980,000	$ 18,140,000	$ 15,700,000	$ 33,751,000																																	$ (960,000)	$ (1,158,000)	$ (1,467,000)	$ (1,491,000)	$ (3,241,000)	$ (2,571,000)															$ (4,871,000)	$ (7,576,000)	$ (8,031,000)	$ (6,960,000)	$ (6,484,000)	$ (5,899,000)
Amounts recognized in other comprehensive income (loss)					(4,264,000)	(311,000)	2,631,000	(3,735,000)	(498,000)	(7,908,000)																													(1,753,000)	0	4,135,000	(7,002,000)	5,825,000	(11,341,000)																																	(89,000)	2,000	100,000	(301,000)	(334,000)	(914,000)															(2,422,000)	(313,000)	(1,604,000)	3,568,000	(5,989,000)	4,347,000
(Gain) Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring															(13,115,000)	(987,000)	(3,385,000)																																(13,115,000)	(987,000)	(3,385,000)																												0	0	0																		0	0	0
(Gain) loss reclassified to earnings	1,592,000	(7,957,000)	(6,041,000)	(15,143,000)							0	(2,580,000)	(13,115,000)	(12,675,000)		(1,593,000)		(6,710,000)	1,247,000	(5,654,000)	6,133,000	(5,275,000)	1,247,000	2,912,000	1,974,000	(5,654,000)	5,382,000	(5,003,000)	345,000	277,000	941,000	2,807,000	345,000	302,000	294,000	277,000	2,215,000	315,000												(1,593,000)		(6,710,000)					0	0	0	0	0	0					0	0	0	0	0	0											0	0	0	0	0	0	0	0	216,000	196,000	209,000	192,000	2,084,000	244,000							0	0	1,247,000	2,912,000	1,974,000	(5,654,000)	5,382,000	(5,003,000)	129,000	106,000	85,000	85,000	131,000	71,000
Balance at end of period					(8,503,000)	(5,831,000)	(8,734,000)	(2,003,000)	9,689,000	5,975,000																													(1,753,000)	0	0	8,558,000	18,140,000	15,700,000																																	(833,000)	(960,000)	(1,158,000)	(1,600,000)	(1,491,000)	(3,241,000)															(5,917,000)	(4,871,000)	(7,576,000)	(8,961,000)	(6,960,000)	(6,484,000)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net																																													(1,000,000)	(200,000)	(1,400,000)	1,700,000
Derivative Instruments, Gain (Loss) Recognized in Income, Net																																																					$ (342,000)	$ 0	$ 5,324,000	$ 0							$ 2,005,000	$ 3,857,000	$ 3,868,000	$ 2,334,000							$ (1,793,000)	$ (257,000)	$ (2,566,000)	$ (995,000)